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-rw-r--r--arch/Kconfig1
-rw-r--r--arch/alpha/mm/fault.c2
-rw-r--r--arch/arm/Kconfig3
-rw-r--r--arch/arm/kernel/early_printk.c17
-rw-r--r--arch/arm/kernel/perf_event.c2
-rw-r--r--arch/arm/kernel/process.c29
-rw-r--r--arch/arm/kernel/signal.c3
-rw-r--r--arch/arm/mach-at91/at91rm9200_time.c2
-rw-r--r--arch/arm/mach-at91/at91sam926x_time.c6
-rw-r--r--arch/arm/mach-exynos/platsmp.c12
-rw-r--r--arch/arm/mach-msm/platsmp.c10
-rw-r--r--arch/arm/mach-omap2/omap-smp.c10
-rw-r--r--arch/arm/mach-tegra/platsmp.c10
-rw-r--r--arch/arm/mach-ux500/platsmp.c10
-rw-r--r--arch/arm/mm/fault.c2
-rw-r--r--arch/arm/plat-versatile/platsmp.c10
-rw-r--r--arch/avr32/kernel/process.c4
-rw-r--r--arch/avr32/mm/fault.c2
-rw-r--r--arch/blackfin/kernel/early_printk.c2
-rw-r--r--arch/blackfin/kernel/process.c4
-rw-r--r--arch/cris/kernel/process.c4
-rw-r--r--arch/cris/mm/fault.c2
-rw-r--r--arch/frv/kernel/process.c4
-rw-r--r--arch/frv/mm/fault.c2
-rw-r--r--arch/h8300/kernel/process.c4
-rw-r--r--arch/ia64/kernel/process.c4
-rw-r--r--arch/ia64/kernel/time.c6
-rw-r--r--arch/ia64/mm/fault.c2
-rw-r--r--arch/m32r/kernel/process.c4
-rw-r--r--arch/m32r/mm/fault.c2
-rw-r--r--arch/m68k/kernel/process_mm.c4
-rw-r--r--arch/m68k/kernel/process_no.c4
-rw-r--r--arch/m68k/mm/fault.c2
-rw-r--r--arch/microblaze/kernel/early_printk.c26
-rw-r--r--arch/microblaze/kernel/process.c4
-rw-r--r--arch/microblaze/mm/fault.c2
-rw-r--r--arch/mips/Kconfig2
-rw-r--r--arch/mips/kernel/early_printk.c10
-rw-r--r--arch/mips/kernel/process.c4
-rw-r--r--arch/mips/kernel/signal.c3
-rw-r--r--arch/mips/mm/fault.c2
-rw-r--r--arch/mn10300/kernel/process.c4
-rw-r--r--arch/mn10300/mm/fault.c2
-rw-r--r--arch/parisc/kernel/process.c4
-rw-r--r--arch/parisc/mm/fault.c2
-rw-r--r--arch/powerpc/Kconfig6
-rw-r--r--arch/powerpc/kernel/idle.c8
-rw-r--r--arch/powerpc/kernel/irq.c3
-rw-r--r--arch/powerpc/kernel/misc_32.S2
-rw-r--r--arch/powerpc/kernel/misc_64.S2
-rw-r--r--arch/powerpc/kernel/smp.c4
-rw-r--r--arch/powerpc/kernel/udbg.c6
-rw-r--r--arch/powerpc/mm/fault.c2
-rw-r--r--arch/powerpc/platforms/85xx/mpc85xx_cds.c2
-rw-r--r--arch/powerpc/platforms/iseries/setup.c8
-rw-r--r--arch/powerpc/platforms/powermac/smp.c4
-rw-r--r--arch/powerpc/platforms/wsp/opb_pic.c3
-rw-r--r--arch/powerpc/sysdev/xics/xics-common.c5
-rw-r--r--arch/s390/kernel/process.c4
-rw-r--r--arch/s390/mm/fault.c6
-rw-r--r--arch/score/kernel/process.c4
-rw-r--r--arch/score/mm/fault.c2
-rw-r--r--arch/sh/kernel/idle.c4
-rw-r--r--arch/sh/kernel/irq.c2
-rw-r--r--arch/sh/kernel/sh_bios.c2
-rw-r--r--arch/sh/mm/fault_32.c2
-rw-r--r--arch/sparc/kernel/irq_64.c2
-rw-r--r--arch/sparc/kernel/process_32.c8
-rw-r--r--arch/sparc/kernel/process_64.c10
-rw-r--r--arch/sparc/kernel/prom_common.c4
-rw-r--r--arch/sparc/kernel/setup_32.c1
-rw-r--r--arch/sparc/kernel/setup_64.c8
-rw-r--r--arch/sparc/mm/fault_32.c4
-rw-r--r--arch/sparc/mm/fault_64.c2
-rw-r--r--arch/tile/kernel/early_printk.c26
-rw-r--r--arch/tile/kernel/process.c4
-rw-r--r--arch/tile/mm/fault.c2
-rw-r--r--arch/um/kernel/early_printk.c8
-rw-r--r--arch/um/kernel/trap.c2
-rw-r--r--arch/unicore32/kernel/early_printk.c12
-rw-r--r--arch/x86/Kconfig6
-rw-r--r--arch/x86/crypto/aesni-intel_glue.c24
-rw-r--r--arch/x86/include/asm/acpi.h4
-rw-r--r--arch/x86/include/asm/page_64_types.h21
-rw-r--r--arch/x86/include/asm/signal.h13
-rw-r--r--arch/x86/include/asm/stackprotector.h10
-rw-r--r--arch/x86/include/asm/vgtod.h2
-rw-r--r--arch/x86/kernel/apic/apic.c6
-rw-r--r--arch/x86/kernel/apic/io_apic.c5
-rw-r--r--arch/x86/kernel/cpu/common.c2
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce.c49
-rw-r--r--arch/x86/kernel/cpu/mcheck/therm_throt.c2
-rw-r--r--arch/x86/kernel/cpu/mcheck/threshold.c2
-rw-r--r--arch/x86/kernel/dumpstack_64.c4
-rw-r--r--arch/x86/kernel/early_printk.c21
-rw-r--r--arch/x86/kernel/entry_32.S8
-rw-r--r--arch/x86/kernel/entry_64.S2
-rw-r--r--arch/x86/kernel/hpet.c27
-rw-r--r--arch/x86/kernel/irq.c6
-rw-r--r--arch/x86/kernel/irq_32.c2
-rw-r--r--arch/x86/kernel/irq_64.c3
-rw-r--r--arch/x86/kernel/irq_work.c2
-rw-r--r--arch/x86/kernel/kprobes.c1
-rw-r--r--arch/x86/kernel/process_32.c45
-rw-r--r--arch/x86/kernel/process_64.c4
-rw-r--r--arch/x86/kernel/signal.c9
-rw-r--r--arch/x86/kernel/traps.c32
-rw-r--r--arch/x86/kernel/vsyscall_64.c10
-rw-r--r--arch/x86/kvm/x86.c7
-rw-r--r--arch/x86/mm/fault.c2
-rw-r--r--arch/x86/mm/highmem_32.c2
-rw-r--r--arch/xtensa/kernel/process.c4
-rw-r--r--arch/xtensa/mm/fault.c2
113 files changed, 423 insertions, 340 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 4b0669cbb3b0..73fc7cd51582 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -6,6 +6,7 @@ config OPROFILE
tristate "OProfile system profiling"
depends on PROFILING
depends on HAVE_OPROFILE
+ depends on !PREEMPT_RT_FULL
select RING_BUFFER
select RING_BUFFER_ALLOW_SWAP
help
diff --git a/arch/alpha/mm/fault.c b/arch/alpha/mm/fault.c
index fadd5f882ff9..4a0a0aff8fd0 100644
--- a/arch/alpha/mm/fault.c
+++ b/arch/alpha/mm/fault.c
@@ -107,7 +107,7 @@ do_page_fault(unsigned long address, unsigned long mmcsr,
/* If we're in an interrupt context, or have no user context,
we must not take the fault. */
- if (!mm || in_atomic())
+ if (!mm || pagefault_disabled())
goto no_context;
#ifdef CONFIG_ALPHA_LARGE_VMALLOC
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b259c7c644e3..be63221185b6 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -29,6 +29,7 @@ config ARM
select HAVE_GENERIC_HARDIRQS
select HAVE_SPARSE_IRQ
select GENERIC_IRQ_SHOW
+ select IRQ_FORCED_THREADING
select CPU_PM if (SUSPEND || CPU_IDLE)
help
The ARM series is a line of low-power-consumption RISC chip designs
@@ -1667,7 +1668,7 @@ config HAVE_ARCH_PFN_VALID
config HIGHMEM
bool "High Memory Support"
- depends on MMU
+ depends on MMU && !PREEMPT_RT_FULL
help
The address space of ARM processors is only 4 Gigabytes large
and it has to accommodate user address space, kernel address
diff --git a/arch/arm/kernel/early_printk.c b/arch/arm/kernel/early_printk.c
index 85aa2b292692..43076536965c 100644
--- a/arch/arm/kernel/early_printk.c
+++ b/arch/arm/kernel/early_printk.c
@@ -29,28 +29,17 @@ static void early_console_write(struct console *con, const char *s, unsigned n)
early_write(s, n);
}
-static struct console early_console = {
+static struct console early_console_dev = {
.name = "earlycon",
.write = early_console_write,
.flags = CON_PRINTBUFFER | CON_BOOT,
.index = -1,
};
-asmlinkage void early_printk(const char *fmt, ...)
-{
- char buf[512];
- int n;
- va_list ap;
-
- va_start(ap, fmt);
- n = vscnprintf(buf, sizeof(buf), fmt, ap);
- early_write(buf, n);
- va_end(ap);
-}
-
static int __init setup_early_printk(char *buf)
{
- register_console(&early_console);
+ early_console = &early_console_dev;
+ register_console(&early_console_dev);
return 0;
}
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 88b0941ce51e..ace1a2abbbd0 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -441,7 +441,7 @@ armpmu_reserve_hardware(struct arm_pmu *armpmu)
}
err = request_irq(irq, handle_irq,
- IRQF_DISABLED | IRQF_NOBALANCING,
+ IRQF_NOBALANCING | IRQF_NO_THREAD,
"arm-pmu", armpmu);
if (err) {
pr_err("unable to request IRQ%d for ARM PMU counters\n",
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 3d0c6fb74ae4..75227b36c234 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -214,9 +214,7 @@ void cpu_idle(void)
}
leds_event(led_idle_end);
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
@@ -491,6 +489,31 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
}
#ifdef CONFIG_MMU
+
+/*
+ * CONFIG_SPLIT_PTLOCK_CPUS results in a page->ptl lock. If the lock is not
+ * initialized by pgtable_page_ctor() then a coredump of the vector page will
+ * fail.
+ */
+static int __init vectors_user_mapping_init_page(void)
+{
+ struct page *page;
+ unsigned long addr = 0xffff0000;
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+
+ pgd = pgd_offset_k(addr);
+ pud = pud_offset(pgd, addr);
+ pmd = pmd_offset(pud, addr);
+ page = pmd_page(*(pmd));
+
+ pgtable_page_ctor(page);
+
+ return 0;
+}
+late_initcall(vectors_user_mapping_init_page);
+
/*
* The vectors page is always readable from user space for the
* atomic helpers and the signal restart code. Let's declare a mapping
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 9e617bd4a146..c7001bc72eb0 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -672,6 +672,9 @@ static void do_signal(struct pt_regs *regs, int syscall)
if (!user_mode(regs))
return;
+ local_irq_enable();
+ preempt_check_resched();
+
/*
* If we were from a system call, check for system call restarting...
*/
diff --git a/arch/arm/mach-at91/at91rm9200_time.c b/arch/arm/mach-at91/at91rm9200_time.c
index 1dd69c85dfec..06665701bebf 100644
--- a/arch/arm/mach-at91/at91rm9200_time.c
+++ b/arch/arm/mach-at91/at91rm9200_time.c
@@ -114,6 +114,7 @@ clkevt32k_mode(enum clock_event_mode mode, struct clock_event_device *dev)
last_crtr = read_CRTR();
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
+ setup_irq(AT91_ID_SYS, &at91rm9200_timer_irq);
/* PIT for periodic irqs; fixed rate of 1/HZ */
irqmask = AT91_ST_PITS;
at91_sys_write(AT91_ST_PIMR, LATCH);
@@ -127,6 +128,7 @@ clkevt32k_mode(enum clock_event_mode mode, struct clock_event_device *dev)
break;
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
+ remove_irq(AT91_ID_SYS, &at91rm9200_timer_irq);
case CLOCK_EVT_MODE_RESUME:
irqmask = 0;
break;
diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c
index 4ba85499fa97..97d1e1459942 100644
--- a/arch/arm/mach-at91/at91sam926x_time.c
+++ b/arch/arm/mach-at91/at91sam926x_time.c
@@ -54,7 +54,7 @@ static struct clocksource pit_clk = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-
+static struct irqaction at91sam926x_pit_irq;
/*
* Clockevent device: interrupts every 1/HZ (== pit_cycles * MCK/16)
*/
@@ -63,6 +63,9 @@ pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev)
{
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
+ /* Set up irq handler */
+ setup_irq(AT91_ID_SYS, &at91sam926x_pit_irq);
+
/* update clocksource counter */
pit_cnt += pit_cycle * PIT_PICNT(at91_sys_read(AT91_PIT_PIVR));
at91_sys_write(AT91_PIT_MR, (pit_cycle - 1) | AT91_PIT_PITEN
@@ -75,6 +78,7 @@ pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev)
case CLOCK_EVT_MODE_UNUSED:
/* disable irq, leaving the clocksource active */
at91_sys_write(AT91_PIT_MR, (pit_cycle - 1) | AT91_PIT_PITEN);
+ remove_irq(AT91_ID_SYS, &at91sam926x_pit_irq);
break;
case CLOCK_EVT_MODE_RESUME:
break;
diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
index 69ffb2fb3875..fe321b0d2ba9 100644
--- a/arch/arm/mach-exynos/platsmp.c
+++ b/arch/arm/mach-exynos/platsmp.c
@@ -63,7 +63,7 @@ static void __iomem *scu_base_addr(void)
return (void __iomem *)(S5P_VA_SCU);
}
-static DEFINE_SPINLOCK(boot_lock);
+static DEFINE_RAW_SPINLOCK(boot_lock);
static void __cpuinit exynos4_gic_secondary_init(void)
{
@@ -108,8 +108,8 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
/*
* Synchronise with the boot thread.
*/
- spin_lock(&boot_lock);
- spin_unlock(&boot_lock);
+ raw_spin_lock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
}
int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
@@ -120,7 +120,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* Set synchronisation state between this boot processor
* and the secondary one
*/
- spin_lock(&boot_lock);
+ raw_spin_lock(&boot_lock);
/*
* The secondary processor is waiting to be released from
@@ -149,7 +149,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
if (timeout == 0) {
printk(KERN_ERR "cpu1 power enable failed");
- spin_unlock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
return -ETIMEDOUT;
}
}
@@ -177,7 +177,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* now the secondary core is starting up let it run its
* calibrations, then wait for it to finish
*/
- spin_unlock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
return pen_release != -1 ? -ENOSYS : 0;
}
diff --git a/arch/arm/mach-msm/platsmp.c b/arch/arm/mach-msm/platsmp.c
index fdec58aaa35c..cad6b8114a92 100644
--- a/arch/arm/mach-msm/platsmp.c
+++ b/arch/arm/mach-msm/platsmp.c
@@ -39,7 +39,7 @@ extern void msm_secondary_startup(void);
*/
volatile int pen_release = -1;
-static DEFINE_SPINLOCK(boot_lock);
+static DEFINE_RAW_SPINLOCK(boot_lock);
static inline int get_core_count(void)
{
@@ -69,8 +69,8 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
/*
* Synchronise with the boot thread.
*/
- spin_lock(&boot_lock);
- spin_unlock(&boot_lock);
+ raw_spin_lock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
}
static __cpuinit void prepare_cold_cpu(unsigned int cpu)
@@ -107,7 +107,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* set synchronisation state between this boot processor
* and the secondary one
*/
- spin_lock(&boot_lock);
+ raw_spin_lock(&boot_lock);
/*
* The secondary processor is waiting to be released from
@@ -141,7 +141,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* now the secondary core is starting up let it run its
* calibrations, then wait for it to finish
*/
- spin_unlock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
return pen_release != -1 ? -ENOSYS : 0;
}
diff --git a/arch/arm/mach-omap2/omap-smp.c b/arch/arm/mach-omap2/omap-smp.c
index 4412ddb7b3f6..490de9c330cd 100644
--- a/arch/arm/mach-omap2/omap-smp.c
+++ b/arch/arm/mach-omap2/omap-smp.c
@@ -29,7 +29,7 @@
/* SCU base address */
static void __iomem *scu_base;
-static DEFINE_SPINLOCK(boot_lock);
+static DEFINE_RAW_SPINLOCK(boot_lock);
void __cpuinit platform_secondary_init(unsigned int cpu)
{
@@ -43,8 +43,8 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
/*
* Synchronise with the boot thread.
*/
- spin_lock(&boot_lock);
- spin_unlock(&boot_lock);
+ raw_spin_lock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
}
int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
@@ -53,7 +53,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* Set synchronisation state between this boot processor
* and the secondary one
*/
- spin_lock(&boot_lock);
+ raw_spin_lock(&boot_lock);
/*
* Update the AuxCoreBoot0 with boot state for secondary core.
@@ -70,7 +70,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* Now the secondary core is starting up let it run its
* calibrations, then wait for it to finish
*/
- spin_unlock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
return 0;
}
diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c
index 7d2b5d03c1df..571f61a35894 100644
--- a/arch/arm/mach-tegra/platsmp.c
+++ b/arch/arm/mach-tegra/platsmp.c
@@ -28,7 +28,7 @@
extern void tegra_secondary_startup(void);
-static DEFINE_SPINLOCK(boot_lock);
+static DEFINE_RAW_SPINLOCK(boot_lock);
static void __iomem *scu_base = IO_ADDRESS(TEGRA_ARM_PERIF_BASE);
#define EVP_CPU_RESET_VECTOR \
@@ -50,8 +50,8 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
/*
* Synchronise with the boot thread.
*/
- spin_lock(&boot_lock);
- spin_unlock(&boot_lock);
+ raw_spin_lock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
}
int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
@@ -65,7 +65,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* set synchronisation state between this boot processor
* and the secondary one
*/
- spin_lock(&boot_lock);
+ raw_spin_lock(&boot_lock);
/* set the reset vector to point to the secondary_startup routine */
@@ -101,7 +101,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* now the secondary core is starting up let it run its
* calibrations, then wait for it to finish
*/
- spin_unlock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
return 0;
}
diff --git a/arch/arm/mach-ux500/platsmp.c b/arch/arm/mach-ux500/platsmp.c
index a19e398dade3..9e92c6cc9817 100644
--- a/arch/arm/mach-ux500/platsmp.c
+++ b/arch/arm/mach-ux500/platsmp.c
@@ -57,7 +57,7 @@ static void __iomem *scu_base_addr(void)
return NULL;
}
-static DEFINE_SPINLOCK(boot_lock);
+static DEFINE_RAW_SPINLOCK(boot_lock);
void __cpuinit platform_secondary_init(unsigned int cpu)
{
@@ -77,8 +77,8 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
/*
* Synchronise with the boot thread.
*/
- spin_lock(&boot_lock);
- spin_unlock(&boot_lock);
+ raw_spin_lock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
}
int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
@@ -89,7 +89,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* set synchronisation state between this boot processor
* and the secondary one
*/
- spin_lock(&boot_lock);
+ raw_spin_lock(&boot_lock);
/*
* The secondary processor is waiting to be released from
@@ -110,7 +110,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* now the secondary core is starting up let it run its
* calibrations, then wait for it to finish
*/
- spin_unlock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
return pen_release != -1 ? -ENOSYS : 0;
}
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index aa33949fef60..d717bd361a7b 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -294,7 +294,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto no_context;
/*
diff --git a/arch/arm/plat-versatile/platsmp.c b/arch/arm/plat-versatile/platsmp.c
index 92f18d372b69..287bbb5b6854 100644
--- a/arch/arm/plat-versatile/platsmp.c
+++ b/arch/arm/plat-versatile/platsmp.c
@@ -37,7 +37,7 @@ static void __cpuinit write_pen_release(int val)
outer_clean_range(__pa(&pen_release), __pa(&pen_release + 1));
}
-static DEFINE_SPINLOCK(boot_lock);
+static DEFINE_RAW_SPINLOCK(boot_lock);
void __cpuinit platform_secondary_init(unsigned int cpu)
{
@@ -57,8 +57,8 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
/*
* Synchronise with the boot thread.
*/
- spin_lock(&boot_lock);
- spin_unlock(&boot_lock);
+ raw_spin_lock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
}
int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
@@ -69,7 +69,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* Set synchronisation state between this boot processor
* and the secondary one
*/
- spin_lock(&boot_lock);
+ raw_spin_lock(&boot_lock);
/*
* This is really belt and braces; we hold unintended secondary
@@ -99,7 +99,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* now the secondary core is starting up let it run its
* calibrations, then wait for it to finish
*/
- spin_unlock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
return pen_release != -1 ? -ENOSYS : 0;
}
diff --git a/arch/avr32/kernel/process.c b/arch/avr32/kernel/process.c
index ef5a2a08fcca..c8724c90d4ca 100644
--- a/arch/avr32/kernel/process.c
+++ b/arch/avr32/kernel/process.c
@@ -38,9 +38,7 @@ void cpu_idle(void)
while (!need_resched())
cpu_idle_sleep();
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/avr32/mm/fault.c b/arch/avr32/mm/fault.c
index f7040a1e399f..155ad8daecf9 100644
--- a/arch/avr32/mm/fault.c
+++ b/arch/avr32/mm/fault.c
@@ -81,7 +81,7 @@ asmlinkage void do_page_fault(unsigned long ecr, struct pt_regs *regs)
* If we're in an interrupt or have no user context, we must
* not take the fault...
*/
- if (in_atomic() || !mm || regs->sr & SYSREG_BIT(GM))
+ if (!mm || regs->sr & SYSREG_BIT(GM) || pagefault_disabled())
goto no_context;
local_irq_enable();
diff --git a/arch/blackfin/kernel/early_printk.c b/arch/blackfin/kernel/early_printk.c
index 84ed8375113c..61fbd2de993d 100644
--- a/arch/blackfin/kernel/early_printk.c
+++ b/arch/blackfin/kernel/early_printk.c
@@ -25,8 +25,6 @@ extern struct console *bfin_earlyserial_init(unsigned int port,
extern struct console *bfin_jc_early_init(void);
#endif
-static struct console *early_console;
-
/* Default console */
#define DEFAULT_PORT 0
#define DEFAULT_CFLAG CS8|B57600
diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index 6a80a9e9fc4a..11acc10e6381 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -92,9 +92,7 @@ void cpu_idle(void)
while (!need_resched())
idle();
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/cris/kernel/process.c b/arch/cris/kernel/process.c
index aa585e4e979e..d8f50ff6fadd 100644
--- a/arch/cris/kernel/process.c
+++ b/arch/cris/kernel/process.c
@@ -115,9 +115,7 @@ void cpu_idle (void)
idle = default_idle;
idle();
}
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/cris/mm/fault.c b/arch/cris/mm/fault.c
index 9dcac8ec8fa0..ba9cfbe818f1 100644
--- a/arch/cris/mm/fault.c
+++ b/arch/cris/mm/fault.c
@@ -111,7 +111,7 @@ do_page_fault(unsigned long address, struct pt_regs *regs,
* user context, we must not take the fault.
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c
index 3901df1213c0..29cc49783787 100644
--- a/arch/frv/kernel/process.c
+++ b/arch/frv/kernel/process.c
@@ -92,9 +92,7 @@ void cpu_idle(void)
idle();
}
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/frv/mm/fault.c b/arch/frv/mm/fault.c
index a325d57a83d5..a9ce0f056565 100644
--- a/arch/frv/mm/fault.c
+++ b/arch/frv/mm/fault.c
@@ -79,7 +79,7 @@ asmlinkage void do_page_fault(int datammu, unsigned long esr0, unsigned long ear
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/h8300/kernel/process.c b/arch/h8300/kernel/process.c
index 933bd388efb2..1a173b35f475 100644
--- a/arch/h8300/kernel/process.c
+++ b/arch/h8300/kernel/process.c
@@ -81,9 +81,7 @@ void cpu_idle(void)
while (1) {
while (!need_resched())
idle();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 6d33c5cc94f0..9dc52b63fc87 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -330,9 +330,7 @@ cpu_idle (void)
normal_xtp();
#endif
}
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
check_pgt_cache();
if (cpu_is_offline(cpu))
play_dead();
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 43920de425f1..6782b710f1de 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -36,7 +36,7 @@
static cycle_t itc_get_cycles(struct clocksource *cs);
struct fsyscall_gtod_data_t fsyscall_gtod_data = {
- .lock = __SEQLOCK_UNLOCKED(fsyscall_gtod_data.lock),
+ .lock = __RAW_SEQLOCK_UNLOCKED(fsyscall_gtod_data.lock),
};
struct itc_jitter_data_t itc_jitter_data;
@@ -462,7 +462,7 @@ void update_vsyscall(struct timespec *wall, struct timespec *wtm,
{
unsigned long flags;
- write_seqlock_irqsave(&fsyscall_gtod_data.lock, flags);
+ raw_write_seqlock_irqsave(&fsyscall_gtod_data.lock, flags);
/* copy fsyscall clock data */
fsyscall_gtod_data.clk_mask = c->mask;
@@ -485,6 +485,6 @@ void update_vsyscall(struct timespec *wall, struct timespec *wtm,
fsyscall_gtod_data.monotonic_time.tv_sec++;
}
- write_sequnlock_irqrestore(&fsyscall_gtod_data.lock, flags);
+ raw_write_sequnlock_irqrestore(&fsyscall_gtod_data.lock, flags);
}
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index 20b359376128..05946c2933e1 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -89,7 +89,7 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
/*
* If we're in an interrupt or have no user context, we must not take the fault..
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto no_context;
#ifdef CONFIG_VIRTUAL_MEM_MAP
diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c
index 422bea9f1dbc..3a4a32b27208 100644
--- a/arch/m32r/kernel/process.c
+++ b/arch/m32r/kernel/process.c
@@ -90,9 +90,7 @@ void cpu_idle (void)
idle();
}
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/m32r/mm/fault.c b/arch/m32r/mm/fault.c
index 2c9aeb453847..6d763f64f48c 100644
--- a/arch/m32r/mm/fault.c
+++ b/arch/m32r/mm/fault.c
@@ -115,7 +115,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code,
* If we're in an interrupt or have no user context or are running in an
* atomic region then we must not take the fault..
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto bad_area_nosemaphore;
/* When running in the kernel we expect faults to occur only to
diff --git a/arch/m68k/kernel/process_mm.c b/arch/m68k/kernel/process_mm.c
index aa4ffb882366..c413aa05e4f7 100644
--- a/arch/m68k/kernel/process_mm.c
+++ b/arch/m68k/kernel/process_mm.c
@@ -94,9 +94,7 @@ void cpu_idle(void)
while (1) {
while (!need_resched())
idle();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/m68k/kernel/process_no.c b/arch/m68k/kernel/process_no.c
index 5e1078cabe0e..f7fe6c348595 100644
--- a/arch/m68k/kernel/process_no.c
+++ b/arch/m68k/kernel/process_no.c
@@ -73,9 +73,7 @@ void cpu_idle(void)
/* endless idle loop with no priority at all */
while (1) {
idle();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index 2db6099784ba..74fe5593abbb 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -85,7 +85,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/microblaze/kernel/early_printk.c b/arch/microblaze/kernel/early_printk.c
index d26d92d47754..04206249fb0d 100644
--- a/arch/microblaze/kernel/early_printk.c
+++ b/arch/microblaze/kernel/early_printk.c
@@ -21,7 +21,6 @@
#include <asm/setup.h>
#include <asm/prom.h>
-static u32 early_console_initialized;
static u32 base_addr;
#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE
@@ -109,27 +108,11 @@ static struct console early_serial_uart16550_console = {
};
#endif /* CONFIG_SERIAL_8250_CONSOLE */
-static struct console *early_console;
-
-void early_printk(const char *fmt, ...)
-{
- char buf[512];
- int n;
- va_list ap;
-
- if (early_console_initialized) {
- va_start(ap, fmt);
- n = vscnprintf(buf, 512, fmt, ap);
- early_console->write(early_console, buf, n);
- va_end(ap);
- }
-}
-
int __init setup_early_printk(char *opt)
{
int version = 0;
- if (early_console_initialized)
+ if (early_console)
return 1;
base_addr = of_early_console(&version);
@@ -159,7 +142,6 @@ int __init setup_early_printk(char *opt)
}
register_console(early_console);
- early_console_initialized = 1;
return 0;
}
return 1;
@@ -169,7 +151,7 @@ int __init setup_early_printk(char *opt)
* only for early console because of performance degression */
void __init remap_early_printk(void)
{
- if (!early_console_initialized || !early_console)
+ if (!early_console)
return;
printk(KERN_INFO "early_printk_console remaping from 0x%x to ",
base_addr);
@@ -179,9 +161,9 @@ void __init remap_early_printk(void)
void __init disable_early_printk(void)
{
- if (!early_console_initialized || !early_console)
+ if (!early_console)
return;
printk(KERN_WARNING "disabling early console\n");
unregister_console(early_console);
- early_console_initialized = 0;
+ early_console = NULL;
}
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 95cc295976a7..d3b2b42ad6ac 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -108,9 +108,7 @@ void cpu_idle(void)
idle();
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
check_pgt_cache();
}
}
diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c
index ae97d2ccdc22..4cdd84db9c4d 100644
--- a/arch/microblaze/mm/fault.c
+++ b/arch/microblaze/mm/fault.c
@@ -107,7 +107,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address,
if ((error_code & 0x13) == 0x13 || (error_code & 0x11) == 0x11)
is_write = 0;
- if (unlikely(in_atomic() || !mm)) {
+ if (unlikely(!mm || pagefault_disabled())) {
if (kernel_mode(regs))
goto bad_area_nosemaphore;
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index d46f1da18a3c..9f02e8b5392f 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2040,7 +2040,7 @@ config CPU_R4400_WORKAROUNDS
#
config HIGHMEM
bool "High Memory Support"
- depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM
+ depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM && !PREEMPT_RT_FULL
config CPU_SUPPORTS_HIGHMEM
bool
diff --git a/arch/mips/kernel/early_printk.c b/arch/mips/kernel/early_printk.c
index 9ae813eb782e..973c995c0a86 100644
--- a/arch/mips/kernel/early_printk.c
+++ b/arch/mips/kernel/early_printk.c
@@ -25,20 +25,18 @@ early_console_write(struct console *con, const char *s, unsigned n)
}
}
-static struct console early_console __initdata = {
+static struct console early_console_prom = {
.name = "early",
.write = early_console_write,
.flags = CON_PRINTBUFFER | CON_BOOT,
.index = -1
};
-static int early_console_initialized __initdata;
-
void __init setup_early_printk(void)
{
- if (early_console_initialized)
+ if (early_console)
return;
- early_console_initialized = 1;
+ early_console = &early_console_prom;
- register_console(&early_console);
+ register_console(&early_console_prom);
}
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index c47f96e453c0..4dbf66d641b7 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -78,9 +78,7 @@ void __noreturn cpu_idle(void)
play_dead();
#endif
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index f8524003676a..1c8f34c62ea1 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -604,6 +604,9 @@ static void do_signal(struct pt_regs *regs)
if (!user_mode(regs))
return;
+ local_irq_enable();
+ preempt_check_resched();
+
if (test_thread_flag(TIF_RESTORE_SIGMASK))
oldset = &current->saved_sigmask;
else
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index 937cf3368164..7ade72b93f3e 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -88,7 +88,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, unsigned long writ
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto bad_area_nosemaphore;
down_read(&mm->mmap_sem);
diff --git a/arch/mn10300/kernel/process.c b/arch/mn10300/kernel/process.c
index 28eec3102535..cac401d37f75 100644
--- a/arch/mn10300/kernel/process.c
+++ b/arch/mn10300/kernel/process.c
@@ -123,9 +123,7 @@ void cpu_idle(void)
idle();
}
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/mn10300/mm/fault.c b/arch/mn10300/mm/fault.c
index 0945409a8022..2fea01cbb27f 100644
--- a/arch/mn10300/mm/fault.c
+++ b/arch/mn10300/mm/fault.c
@@ -168,7 +168,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 4b4b9181a1a0..f6eb36736cf0 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -71,9 +71,7 @@ void cpu_idle(void)
while (1) {
while (!need_resched())
barrier();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
check_pgt_cache();
}
}
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 18162ce4261e..df22f39fb545 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -176,7 +176,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
unsigned long acc_type;
int fault;
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 951e18f5335b..d01baf829664 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -69,10 +69,11 @@ config LOCKDEP_SUPPORT
config RWSEM_GENERIC_SPINLOCK
bool
+ default y if PREEMPT_RT_FULL
config RWSEM_XCHGADD_ALGORITHM
bool
- default y
+ default y if !PREEMPT_RT_FULL
config GENERIC_LOCKBREAK
bool
@@ -132,6 +133,7 @@ config PPC
select IRQ_PER_CPU
select GENERIC_IRQ_SHOW
select GENERIC_IRQ_SHOW_LEVEL
+ select IRQ_FORCED_THREADING
select HAVE_RCU_TABLE_FREE if SMP
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_BPF_JIT if (PPC64 && NET)
@@ -274,7 +276,7 @@ menu "Kernel options"
config HIGHMEM
bool "High memory support"
- depends on PPC32
+ depends on PPC32 && !PREEMPT_RT_FULL
source kernel/time/Kconfig
source kernel/Kconfig.hz
diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c
index 39a2baa6ad58..5d70d1046e11 100644
--- a/arch/powerpc/kernel/idle.c
+++ b/arch/powerpc/kernel/idle.c
@@ -94,11 +94,11 @@ void cpu_idle(void)
HMT_medium();
ppc64_runlatch_on();
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- if (cpu_should_die())
+ if (cpu_should_die()) {
+ __preempt_enable_no_resched();
cpu_die();
- schedule();
- preempt_disable();
+ }
+ schedule_preempt_disabled();
}
}
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 745c1e7c10fd..e0ee53177ea5 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -440,6 +440,7 @@ void irq_ctx_init(void)
}
}
+#ifndef CONFIG_PREEMPT_RT_FULL
static inline void do_softirq_onstack(void)
{
struct thread_info *curtp, *irqtp;
@@ -476,7 +477,7 @@ void do_softirq(void)
local_irq_restore(flags);
}
-
+#endif
/*
* IRQ controller and virtual interrupts
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 7cd07b42ca1a..46c607300b29 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -36,6 +36,7 @@
.text
+#ifndef CONFIG_PREEMPT_RT_FULL
_GLOBAL(call_do_softirq)
mflr r0
stw r0,4(r1)
@@ -46,6 +47,7 @@ _GLOBAL(call_do_softirq)
lwz r0,4(r1)
mtlr r0
blr
+#endif
_GLOBAL(call_handle_irq)
mflr r0
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 616921ef1439..2961d7521726 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -29,6 +29,7 @@
.text
+#ifndef CONFIG_PREEMPT_RT_FULL
_GLOBAL(call_do_softirq)
mflr r0
std r0,16(r1)
@@ -39,6 +40,7 @@ _GLOBAL(call_do_softirq)
ld r0,16(r1)
mtlr r0
blr
+#endif
_GLOBAL(call_handle_irq)
ld r8,0(r6)
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 6df70907d60a..abdedd3a314d 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -187,8 +187,8 @@ int smp_request_message_ipi(int virq, int msg)
return 1;
}
#endif
- err = request_irq(virq, smp_ipi_action[msg], IRQF_PERCPU,
- smp_ipi_name[msg], 0);
+ err = request_irq(virq, smp_ipi_action[msg],
+ IRQF_PERCPU | IRQF_NO_THREAD, smp_ipi_name[msg], 0);
WARN(err < 0, "unable to request_irq %d for %s (rc %d)\n",
virq, smp_ipi_name[msg], err);
diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 57fa2c0a531c..1b9174d96dcc 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -182,15 +182,13 @@ static struct console udbg_console = {
.index = 0,
};
-static int early_console_initialized;
-
/*
* Called by setup_system after ppc_md->probe and ppc_md->early_init.
* Call it again after setting udbg_putc in ppc_md->setup_arch.
*/
void __init register_early_udbg_console(void)
{
- if (early_console_initialized)
+ if (early_console)
return;
if (!udbg_putc)
@@ -200,7 +198,7 @@ void __init register_early_udbg_console(void)
printk(KERN_INFO "early console immortal !\n");
udbg_console.flags &= ~CON_BOOT;
}
- early_console_initialized = 1;
+ early_console = &udbg_console;
register_console(&udbg_console);
}
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 5efe8c96d37f..94bedd4032aa 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -162,7 +162,7 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address,
}
#endif
- if (in_atomic() || mm == NULL) {
+ if (!mm || pagefault_disabled()) {
if (!user_mode(regs))
return SIGSEGV;
/* in_atomic() in user mode is really bad,
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_cds.c b/arch/powerpc/platforms/85xx/mpc85xx_cds.c
index 66cb8d64079f..7e2a4d231e74 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_cds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_cds.c
@@ -177,7 +177,7 @@ static irqreturn_t mpc85xx_8259_cascade_action(int irq, void *dev_id)
static struct irqaction mpc85xxcds_8259_irqaction = {
.handler = mpc85xx_8259_cascade_action,
- .flags = IRQF_SHARED,
+ .flags = IRQF_SHARED | IRQF_NO_THREAD,
.name = "8259 cascade",
};
#endif /* PPC_I8259 */
diff --git a/arch/powerpc/platforms/iseries/setup.c b/arch/powerpc/platforms/iseries/setup.c
index ea0acbd8966d..e0c5b4953c2f 100644
--- a/arch/powerpc/platforms/iseries/setup.c
+++ b/arch/powerpc/platforms/iseries/setup.c
@@ -582,9 +582,7 @@ static void iseries_shared_idle(void)
if (hvlpevent_is_pending())
process_iSeries_events();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
@@ -611,9 +609,7 @@ static void iseries_dedicated_idle(void)
ppc64_runlatch_on();
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c
index 9b6a820bdd7d..71002f34d012 100644
--- a/arch/powerpc/platforms/powermac/smp.c
+++ b/arch/powerpc/platforms/powermac/smp.c
@@ -200,7 +200,7 @@ static int psurge_secondary_ipi_init(void)
if (psurge_secondary_virq)
rc = request_irq(psurge_secondary_virq, psurge_ipi_intr,
- IRQF_PERCPU, "IPI", NULL);
+ IRQF_NO_THREAD | IRQF_PERCPU, "IPI", NULL);
if (rc)
pr_err("Failed to setup secondary cpu IPI\n");
@@ -408,7 +408,7 @@ static int __init smp_psurge_kick_cpu(int nr)
static struct irqaction psurge_irqaction = {
.handler = psurge_ipi_intr,
- .flags = IRQF_PERCPU,
+ .flags = IRQF_PERCPU | IRQF_NO_THREAD,
.name = "primary IPI",
};
diff --git a/arch/powerpc/platforms/wsp/opb_pic.c b/arch/powerpc/platforms/wsp/opb_pic.c
index be05631a3c1c..19f353dfcd03 100644
--- a/arch/powerpc/platforms/wsp/opb_pic.c
+++ b/arch/powerpc/platforms/wsp/opb_pic.c
@@ -320,7 +320,8 @@ void __init opb_pic_init(void)
}
/* Attach opb interrupt handler to new virtual IRQ */
- rc = request_irq(virq, opb_irq_handler, 0, "OPB LS Cascade", opb);
+ rc = request_irq(virq, opb_irq_handler, IRQF_NO_THREAD,
+ "OPB LS Cascade", opb);
if (rc) {
printk("opb: request_irq failed: %d\n", rc);
continue;
diff --git a/arch/powerpc/sysdev/xics/xics-common.c b/arch/powerpc/sysdev/xics/xics-common.c
index 63762c672a03..4ba61941acbe 100644
--- a/arch/powerpc/sysdev/xics/xics-common.c
+++ b/arch/powerpc/sysdev/xics/xics-common.c
@@ -134,10 +134,11 @@ static void xics_request_ipi(void)
BUG_ON(ipi == NO_IRQ);
/*
- * IPIs are marked IRQF_PERCPU. The handler was set in map.
+ * IPIs are marked PERCPU and also IRQF_NO_THREAD as they must
+ * run in hard interrupt context. The handler was set in map.
*/
BUG_ON(request_irq(ipi, icp_ops->ipi_action,
- IRQF_PERCPU, "IPI", NULL));
+ IRQF_NO_THREAD|IRQF_PERCPU, "IPI", NULL));
}
int __init xics_smp_probe(void)
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 9451b210a1b4..092b7040c6a5 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -95,9 +95,7 @@ void cpu_idle(void)
while (!need_resched())
default_idle();
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index a9a301866b3c..1d345e85d9ce 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -295,7 +295,8 @@ static inline int do_exception(struct pt_regs *regs, int access,
* user context.
*/
fault = VM_FAULT_BADCONTEXT;
- if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm))
+ if (unlikely(!user_space_fault(trans_exc_code) ||
+ !mm || pagefault_disabled()))
goto out;
address = trans_exc_code & __FAIL_ADDR_MASK;
@@ -426,7 +427,8 @@ void __kprobes do_asce_exception(struct pt_regs *regs, long pgm_int_code,
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
- if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm))
+ if (unlikely(!user_space_fault(trans_exc_code) ||
+ !mm || pagefault_disabled()))
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/score/kernel/process.c b/arch/score/kernel/process.c
index 25d08030a883..2707023c7563 100644
--- a/arch/score/kernel/process.c
+++ b/arch/score/kernel/process.c
@@ -53,9 +53,7 @@ void __noreturn cpu_idle(void)
while (!need_resched())
barrier();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/score/mm/fault.c b/arch/score/mm/fault.c
index 47b600e4b2c5..59fccbe9777b 100644
--- a/arch/score/mm/fault.c
+++ b/arch/score/mm/fault.c
@@ -72,7 +72,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto bad_area_nosemaphore;
down_read(&mm->mmap_sem);
diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
index db4ecd731a00..b7c18f0899c9 100644
--- a/arch/sh/kernel/idle.c
+++ b/arch/sh/kernel/idle.c
@@ -112,9 +112,7 @@ void cpu_idle(void)
}
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index a3ee91971129..9127bc05d629 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -149,6 +149,7 @@ void irq_ctx_exit(int cpu)
hardirq_ctx[cpu] = NULL;
}
+#ifndef CONFIG_PREEMPT_RT_FULL
asmlinkage void do_softirq(void)
{
unsigned long flags;
@@ -191,6 +192,7 @@ asmlinkage void do_softirq(void)
local_irq_restore(flags);
}
+#endif
#else
static inline void handle_one_irq(unsigned int irq)
{
diff --git a/arch/sh/kernel/sh_bios.c b/arch/sh/kernel/sh_bios.c
index 47475cca068a..a5b51b9d7338 100644
--- a/arch/sh/kernel/sh_bios.c
+++ b/arch/sh/kernel/sh_bios.c
@@ -144,8 +144,6 @@ static struct console bios_console = {
.index = -1,
};
-static struct console *early_console;
-
static int __init setup_early_printk(char *buf)
{
int keep_early = 0;
diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c
index 7bebd044f2a1..643670db6664 100644
--- a/arch/sh/mm/fault_32.c
+++ b/arch/sh/mm/fault_32.c
@@ -166,7 +166,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
* If we're in an interrupt, have no user context or are running
* in an atomic region then we must not take the fault:
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto no_context;
down_read(&mm->mmap_sem);
diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c
index d45b710ea7e4..c3a3737df3c7 100644
--- a/arch/sparc/kernel/irq_64.c
+++ b/arch/sparc/kernel/irq_64.c
@@ -699,6 +699,7 @@ void __irq_entry handler_irq(int pil, struct pt_regs *regs)
set_irq_regs(old_regs);
}
+#ifndef CONFIG_PREEMPT_RT_FULL
void do_softirq(void)
{
unsigned long flags;
@@ -724,6 +725,7 @@ void do_softirq(void)
local_irq_restore(flags);
}
+#endif
#ifdef CONFIG_HOTPLUG_CPU
void fixup_irqs(void)
diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index f793742eec2b..935fdbcd88c2 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -113,9 +113,7 @@ void cpu_idle(void)
while (!need_resched())
cpu_relax();
}
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
check_pgt_cache();
}
}
@@ -138,9 +136,7 @@ void cpu_idle(void)
while (!need_resched())
cpu_relax();
}
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
check_pgt_cache();
}
}
diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index 3739a06a76cb..86fe09afc89a 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -102,15 +102,13 @@ void cpu_idle(void)
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
-
#ifdef CONFIG_HOTPLUG_CPU
- if (cpu_is_offline(cpu))
+ if (cpu_is_offline(cpu)) {
+ __preempt_enable_no_resched();
cpu_play_dead();
+ }
#endif
-
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/sparc/kernel/prom_common.c b/arch/sparc/kernel/prom_common.c
index 741df916c124..ca73a288e179 100644
--- a/arch/sparc/kernel/prom_common.c
+++ b/arch/sparc/kernel/prom_common.c
@@ -65,7 +65,7 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
err = -ENODEV;
mutex_lock(&of_set_property_mutex);
- write_lock(&devtree_lock);
+ raw_spin_lock(&devtree_lock);
prevp = &dp->properties;
while (*prevp) {
struct property *prop = *prevp;
@@ -92,7 +92,7 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
}
prevp = &(*prevp)->next;
}
- write_unlock(&devtree_lock);
+ raw_spin_unlock(&devtree_lock);
mutex_unlock(&of_set_property_mutex);
/* XXX Upate procfs if necessary... */
diff --git a/arch/sparc/kernel/setup_32.c b/arch/sparc/kernel/setup_32.c
index fe1e3fc31bc5..e6475f03231d 100644
--- a/arch/sparc/kernel/setup_32.c
+++ b/arch/sparc/kernel/setup_32.c
@@ -221,6 +221,7 @@ void __init setup_arch(char **cmdline_p)
boot_flags_init(*cmdline_p);
+ early_console = &prom_early_console;
register_console(&prom_early_console);
/* Set sparc_cpu_model */
diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index a854a1c240ff..b85d039678af 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -487,6 +487,12 @@ static void __init init_sparc64_elf_hwcap(void)
popc_patch();
}
+static inline void register_prom_console(void)
+{
+ early_console = &prom_early_console;
+ register_console(&prom_early_console);
+}
+
void __init setup_arch(char **cmdline_p)
{
/* Initialize PROM console and command line. */
@@ -498,7 +504,7 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_EARLYFB
if (btext_find_display())
#endif
- register_console(&prom_early_console);
+ register_prom_console();
if (tlb_type == hypervisor)
printk("ARCH: SUN4V\n");
diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c
index 8023fd7e77b5..054cf56ce057 100644
--- a/arch/sparc/mm/fault_32.c
+++ b/arch/sparc/mm/fault_32.c
@@ -247,8 +247,8 @@ asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm)
- goto no_context;
+ if (!mm || pagefault_disabled())
+ goto no_context;
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
index 504c0622f729..f6572f87d07e 100644
--- a/arch/sparc/mm/fault_64.c
+++ b/arch/sparc/mm/fault_64.c
@@ -322,7 +322,7 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm)
+ if (!mm || pagefault_disabled())
goto intr_or_no_mm;
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
diff --git a/arch/tile/kernel/early_printk.c b/arch/tile/kernel/early_printk.c
index 493a0e66d916..ba2ac0028f2e 100644
--- a/arch/tile/kernel/early_printk.c
+++ b/arch/tile/kernel/early_printk.c
@@ -32,25 +32,8 @@ static struct console early_hv_console = {
};
/* Direct interface for emergencies */
-static struct console *early_console = &early_hv_console;
-static int early_console_initialized;
static int early_console_complete;
-static void early_vprintk(const char *fmt, va_list ap)
-{
- char buf[512];
- int n = vscnprintf(buf, sizeof(buf), fmt, ap);
- early_console->write(early_console, buf, n);
-}
-
-void early_printk(const char *fmt, ...)
-{
- va_list ap;
- va_start(ap, fmt);
- early_vprintk(fmt, ap);
- va_end(ap);
-}
-
void early_panic(const char *fmt, ...)
{
va_list ap;
@@ -68,14 +51,13 @@ static int __initdata keep_early;
static int __init setup_early_printk(char *str)
{
- if (early_console_initialized)
+ if (early_console)
return 1;
if (str != NULL && strncmp(str, "keep", 4) == 0)
keep_early = 1;
early_console = &early_hv_console;
- early_console_initialized = 1;
register_console(early_console);
return 0;
@@ -84,12 +66,12 @@ static int __init setup_early_printk(char *str)
void __init disable_early_printk(void)
{
early_console_complete = 1;
- if (!early_console_initialized || !early_console)
+ if (!early_console)
return;
if (!keep_early) {
early_printk("disabling early console\n");
unregister_console(early_console);
- early_console_initialized = 0;
+ early_console = NULL;
} else {
early_printk("keeping early console\n");
}
@@ -97,7 +79,7 @@ void __init disable_early_printk(void)
void warn_early_printk(void)
{
- if (early_console_complete || early_console_initialized)
+ if (early_console_complete || early_console)
return;
early_printk("\
Machine shutting down before console output is fully initialized.\n\
diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c
index 9c45d8bbdf57..5a8b631eedff 100644
--- a/arch/tile/kernel/process.c
+++ b/arch/tile/kernel/process.c
@@ -106,9 +106,7 @@ void cpu_idle(void)
current_thread_info()->status |= TS_POLLING;
}
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c
index 25b7b90fd620..1b6fa511010d 100644
--- a/arch/tile/mm/fault.c
+++ b/arch/tile/mm/fault.c
@@ -346,7 +346,7 @@ static int handle_page_fault(struct pt_regs *regs,
* If we're in an interrupt, have no user context or are running in an
* atomic region then we must not take the fault.
*/
- if (in_atomic() || !mm) {
+ if (!mm || pagefault_disabled()) {
vma = NULL; /* happy compiler */
goto bad_area_nosemaphore;
}
diff --git a/arch/um/kernel/early_printk.c b/arch/um/kernel/early_printk.c
index ec649bf72f68..183060f76a11 100644
--- a/arch/um/kernel/early_printk.c
+++ b/arch/um/kernel/early_printk.c
@@ -16,7 +16,7 @@ static void early_console_write(struct console *con, const char *s, unsigned int
um_early_printk(s, n);
}
-static struct console early_console = {
+static struct console early_console_dev = {
.name = "earlycon",
.write = early_console_write,
.flags = CON_BOOT,
@@ -25,8 +25,10 @@ static struct console early_console = {
static int __init setup_early_printk(char *buf)
{
- register_console(&early_console);
-
+ if (!early_console) {
+ early_console = &early_console_dev;
+ register_console(&early_console_dev);
+ }
return 0;
}
diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c
index dafc94715950..78780693eb6d 100644
--- a/arch/um/kernel/trap.c
+++ b/arch/um/kernel/trap.c
@@ -37,7 +37,7 @@ int handle_page_fault(unsigned long address, unsigned long ip,
* If the fault was during atomic operation, don't take the fault, just
* fail.
*/
- if (in_atomic())
+ if (!mm || pagefault_disabled())
goto out_nosemaphore;
down_read(&mm->mmap_sem);
diff --git a/arch/unicore32/kernel/early_printk.c b/arch/unicore32/kernel/early_printk.c
index 3922255f1fa8..9be0d5d02a9a 100644
--- a/arch/unicore32/kernel/early_printk.c
+++ b/arch/unicore32/kernel/early_printk.c
@@ -33,21 +33,17 @@ static struct console early_ocd_console = {
.index = -1,
};
-/* Direct interface for emergencies */
-static struct console *early_console = &early_ocd_console;
-
-static int __initdata keep_early;
-
static int __init setup_early_printk(char *buf)
{
- if (!buf)
+ int keep_early;
+
+ if (!buf || early_console)
return 0;
if (strstr(buf, "keep"))
keep_early = 1;
- if (!strncmp(buf, "ocd", 3))
- early_console = &early_ocd_console;
+ early_console = &early_ocd_console;
if (keep_early)
early_console->flags &= ~CON_BOOT;
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index efb42949cc09..c42146edf618 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -161,10 +161,10 @@ config ARCH_MAY_HAVE_PC_FDC
def_bool ISA_DMA_API
config RWSEM_GENERIC_SPINLOCK
- def_bool !X86_XADD
+ def_bool !X86_XADD || PREEMPT_RT_FULL
config RWSEM_XCHGADD_ALGORITHM
- def_bool X86_XADD
+ def_bool X86_XADD && !RWSEM_GENERIC_SPINLOCK && !PREEMPT_RT_FULL
config ARCH_HAS_CPU_IDLE_WAIT
def_bool y
@@ -730,7 +730,7 @@ config IOMMU_HELPER
config MAXSMP
bool "Enable Maximum number of SMP Processors and NUMA Nodes"
depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
- select CPUMASK_OFFSTACK
+ select CPUMASK_OFFSTACK if !PREEMPT_RT_FULL
---help---
Enable maximum number of CPUS and NUMA Nodes for this architecture.
If unsure, say N.
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index 545d0ce59818..0c9eaf1ca0a1 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -289,14 +289,14 @@ static int ecb_encrypt(struct blkcipher_desc *desc,
err = blkcipher_walk_virt(desc, &walk);
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
- kernel_fpu_begin();
while ((nbytes = walk.nbytes)) {
+ kernel_fpu_begin();
aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
- nbytes & AES_BLOCK_MASK);
+ nbytes & AES_BLOCK_MASK);
+ kernel_fpu_end();
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
- kernel_fpu_end();
return err;
}
@@ -313,14 +313,14 @@ static int ecb_decrypt(struct blkcipher_desc *desc,
err = blkcipher_walk_virt(desc, &walk);
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
- kernel_fpu_begin();
while ((nbytes = walk.nbytes)) {
+ kernel_fpu_begin();
aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
nbytes & AES_BLOCK_MASK);
+ kernel_fpu_end();
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
- kernel_fpu_end();
return err;
}
@@ -359,14 +359,14 @@ static int cbc_encrypt(struct blkcipher_desc *desc,
err = blkcipher_walk_virt(desc, &walk);
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
- kernel_fpu_begin();
while ((nbytes = walk.nbytes)) {
+ kernel_fpu_begin();
aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
nbytes & AES_BLOCK_MASK, walk.iv);
+ kernel_fpu_end();
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
- kernel_fpu_end();
return err;
}
@@ -383,14 +383,14 @@ static int cbc_decrypt(struct blkcipher_desc *desc,
err = blkcipher_walk_virt(desc, &walk);
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
- kernel_fpu_begin();
while ((nbytes = walk.nbytes)) {
+ kernel_fpu_begin();
aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
nbytes & AES_BLOCK_MASK, walk.iv);
+ kernel_fpu_end();
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
- kernel_fpu_end();
return err;
}
@@ -445,18 +445,20 @@ static int ctr_crypt(struct blkcipher_desc *desc,
err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
- kernel_fpu_begin();
while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
+ kernel_fpu_begin();
aesni_ctr_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
nbytes & AES_BLOCK_MASK, walk.iv);
+ kernel_fpu_end();
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
if (walk.nbytes) {
+ kernel_fpu_begin();
ctr_crypt_final(ctx, &walk);
+ kernel_fpu_end();
err = blkcipher_walk_done(desc, &walk, 0);
}
- kernel_fpu_end();
return err;
}
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 610001d385dd..c1c23d256ac6 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -51,8 +51,8 @@
#define ACPI_ASM_MACROS
#define BREAKPOINT3
-#define ACPI_DISABLE_IRQS() local_irq_disable()
-#define ACPI_ENABLE_IRQS() local_irq_enable()
+#define ACPI_DISABLE_IRQS() local_irq_disable_nort()
+#define ACPI_ENABLE_IRQS() local_irq_enable_nort()
#define ACPI_FLUSH_CPU_CACHE() wbinvd()
int __acpi_acquire_global_lock(unsigned int *lock);
diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h
index 7639dbf5d223..0883ecdbc905 100644
--- a/arch/x86/include/asm/page_64_types.h
+++ b/arch/x86/include/asm/page_64_types.h
@@ -14,12 +14,21 @@
#define IRQ_STACK_ORDER 2
#define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER)
-#define STACKFAULT_STACK 1
-#define DOUBLEFAULT_STACK 2
-#define NMI_STACK 3
-#define DEBUG_STACK 4
-#define MCE_STACK 5
-#define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
+#ifdef CONFIG_PREEMPT_RT_FULL
+# define STACKFAULT_STACK 0
+# define DOUBLEFAULT_STACK 1
+# define NMI_STACK 2
+# define DEBUG_STACK 0
+# define MCE_STACK 3
+# define N_EXCEPTION_STACKS 3 /* hw limit: 7 */
+#else
+# define STACKFAULT_STACK 1
+# define DOUBLEFAULT_STACK 2
+# define NMI_STACK 3
+# define DEBUG_STACK 4
+# define MCE_STACK 5
+# define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
+#endif
#define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT)
#define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1))
diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h
index 598457cbd0f8..1213ebd7bee7 100644
--- a/arch/x86/include/asm/signal.h
+++ b/arch/x86/include/asm/signal.h
@@ -31,6 +31,19 @@ typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
+/*
+ * Because some traps use the IST stack, we must keep
+ * preemption disabled while calling do_trap(), but do_trap()
+ * may call force_sig_info() which will grab the signal spin_locks
+ * for the task, which in PREEMPT_RT_FULL are mutexes.
+ * By defining ARCH_RT_DELAYS_SIGNAL_SEND the force_sig_info() will
+ * set TIF_NOTIFY_RESUME and set up the signal to be sent on exit
+ * of the trap.
+ */
+#if defined(CONFIG_PREEMPT_RT_FULL) && defined(CONFIG_X86_64)
+#define ARCH_RT_DELAYS_SIGNAL_SEND
+#endif
+
#else
/* Here we must cater to libcs that poke about in kernel headers. */
diff --git a/arch/x86/include/asm/stackprotector.h b/arch/x86/include/asm/stackprotector.h
index 157517763565..ac0703bcfe17 100644
--- a/arch/x86/include/asm/stackprotector.h
+++ b/arch/x86/include/asm/stackprotector.h
@@ -58,7 +58,7 @@
*/
static __always_inline void boot_init_stack_canary(void)
{
- u64 canary;
+ u64 uninitialized_var(canary);
u64 tsc;
#ifdef CONFIG_X86_64
@@ -69,8 +69,16 @@ static __always_inline void boot_init_stack_canary(void)
* of randomness. The TSC only matters for very early init,
* there it already has some randomness on most systems. Later
* on during the bootup the random pool has true entropy too.
+ *
+ * For preempt-rt we need to weaken the randomness a bit, as
+ * we can't call into the random generator from atomic context
+ * due to locking constraints. We just leave canary
+ * uninitialized and use the TSC based randomness on top of
+ * it.
*/
+#ifndef CONFIG_PREEMPT_RT_FULL
get_random_bytes(&canary, sizeof(canary));
+#endif
tsc = __native_read_tsc();
canary += tsc + (tsc << 32UL);
diff --git a/arch/x86/include/asm/vgtod.h b/arch/x86/include/asm/vgtod.h
index 815285bcaceb..0440e3700f67 100644
--- a/arch/x86/include/asm/vgtod.h
+++ b/arch/x86/include/asm/vgtod.h
@@ -5,7 +5,7 @@
#include <linux/clocksource.h>
struct vsyscall_gtod_data {
- seqlock_t lock;
+ raw_seqlock_t lock;
/* open coded 'struct timespec' */
time_t wall_time_sec;
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index f98d84caf94c..2cd2d93643dc 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -876,8 +876,8 @@ void __irq_entry smp_apic_timer_interrupt(struct pt_regs *regs)
* Besides, if we don't timer interrupts ignore the global
* interrupt lock, which is the WrongThing (tm) to do.
*/
- exit_idle();
irq_enter();
+ exit_idle();
local_apic_timer_interrupt();
irq_exit();
@@ -1809,8 +1809,8 @@ void smp_spurious_interrupt(struct pt_regs *regs)
{
u32 v;
- exit_idle();
irq_enter();
+ exit_idle();
/*
* Check if this really is a spurious interrupt and ACK it
* if it is a vectored one. Just in case...
@@ -1846,8 +1846,8 @@ void smp_error_interrupt(struct pt_regs *regs)
"Illegal register address", /* APIC Error Bit 7 */
};
- exit_idle();
irq_enter();
+ exit_idle();
/* First tickle the hardware, only then report what went on. -- REW */
v0 = apic_read(APIC_ESR);
apic_write(APIC_ESR, 0);
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 6d939d7847e2..91527bc8a621 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2421,8 +2421,8 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
unsigned vector, me;
ack_APIC_irq();
- exit_idle();
irq_enter();
+ exit_idle();
me = smp_processor_id();
for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) {
@@ -2521,7 +2521,8 @@ static void ack_apic_level(struct irq_data *data)
irq_complete_move(cfg);
#ifdef CONFIG_GENERIC_PENDING_IRQ
/* If we are moving the irq we need to mask it */
- if (unlikely(irqd_is_setaffinity_pending(data))) {
+ if (unlikely(irqd_is_setaffinity_pending(data) &&
+ !irqd_irq_inprogress(data))) {
do_unmask_irq = 1;
mask_ioapic(cfg);
}
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index aa003b13a831..d39b525fd321 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1055,7 +1055,9 @@ DEFINE_PER_CPU(unsigned int, irq_count) = -1;
*/
static const unsigned int exception_stack_sizes[N_EXCEPTION_STACKS] = {
[0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STKSZ,
+#if DEBUG_STACK > 0
[DEBUG_STACK - 1] = DEBUG_STKSZ
+#endif
};
static DEFINE_PER_CPU_PAGE_ALIGNED(char, exception_stacks
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 2af127d4c3d1..f1f1cb1cdad9 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -38,6 +38,7 @@
#include <linux/debugfs.h>
#include <linux/irq_work.h>
#include <linux/export.h>
+#include <linux/jiffies.h>
#include <asm/processor.h>
#include <asm/mce.h>
@@ -1106,17 +1107,14 @@ void mce_log_therm_throt_event(__u64 status)
* poller finds an MCE, poll 2x faster. When the poller finds no more
* errors, poll 2x slower (up to check_interval seconds).
*/
-static int check_interval = 5 * 60; /* 5 minutes */
+static unsigned long check_interval = 5 * 60; /* 5 minutes */
-static DEFINE_PER_CPU(int, mce_next_interval); /* in jiffies */
-static DEFINE_PER_CPU(struct timer_list, mce_timer);
+static DEFINE_PER_CPU(unsigned long, mce_next_interval); /* in jiffies */
+static DEFINE_PER_CPU(struct hrtimer, mce_timer);
-static void mce_start_timer(unsigned long data)
+static enum hrtimer_restart mce_start_timer(struct hrtimer *timer)
{
- struct timer_list *t = &per_cpu(mce_timer, data);
- int *n;
-
- WARN_ON(smp_processor_id() != data);
+ unsigned long *n;
if (mce_available(__this_cpu_ptr(&cpu_info))) {
machine_check_poll(MCP_TIMESTAMP,
@@ -1129,21 +1127,22 @@ static void mce_start_timer(unsigned long data)
*/
n = &__get_cpu_var(mce_next_interval);
if (mce_notify_irq())
- *n = max(*n/2, HZ/100);
+ *n = max(*n/2, HZ/100UL);
else
- *n = min(*n*2, (int)round_jiffies_relative(check_interval*HZ));
+ *n = min(*n*2, round_jiffies_relative(check_interval*HZ));
- t->expires = jiffies + *n;
- add_timer_on(t, smp_processor_id());
+ hrtimer_forward(timer, timer->base->get_time(),
+ ns_to_ktime(jiffies_to_usecs(*n) * 1000));
+ return HRTIMER_RESTART;
}
-/* Must not be called in IRQ context where del_timer_sync() can deadlock */
+/* Must not be called in IRQ context where hrtimer_cancel() can deadlock */
static void mce_timer_delete_all(void)
{
int cpu;
for_each_online_cpu(cpu)
- del_timer_sync(&per_cpu(mce_timer, cpu));
+ hrtimer_cancel(&per_cpu(mce_timer, cpu));
}
static void mce_do_trigger(struct work_struct *work)
@@ -1375,10 +1374,11 @@ static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
static void __mcheck_cpu_init_timer(void)
{
- struct timer_list *t = &__get_cpu_var(mce_timer);
- int *n = &__get_cpu_var(mce_next_interval);
+ struct hrtimer *t = &__get_cpu_var(mce_timer);
+ unsigned long *n = &__get_cpu_var(mce_next_interval);
- setup_timer(t, mce_start_timer, smp_processor_id());
+ hrtimer_init(t, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ t->function = mce_start_timer;
if (mce_ignore_ce)
return;
@@ -1386,8 +1386,9 @@ static void __mcheck_cpu_init_timer(void)
*n = check_interval * HZ;
if (!*n)
return;
- t->expires = round_jiffies(jiffies + *n);
- add_timer_on(t, smp_processor_id());
+
+ hrtimer_start_range_ns(t, ns_to_ktime(jiffies_to_usecs(*n) * 1000),
+ 0 , HRTIMER_MODE_REL_PINNED);
}
/* Handle unconfigured int18 (should never happen) */
@@ -2023,6 +2024,8 @@ static void __cpuinit mce_disable_cpu(void *h)
if (!mce_available(__this_cpu_ptr(&cpu_info)))
return;
+ hrtimer_cancel(&__get_cpu_var(mce_timer));
+
if (!(action & CPU_TASKS_FROZEN))
cmci_clear();
for (i = 0; i < banks; i++) {
@@ -2049,6 +2052,7 @@ static void __cpuinit mce_reenable_cpu(void *h)
if (b->init)
wrmsrl(MSR_IA32_MCx_CTL(i), b->ctl);
}
+ __mcheck_cpu_init_timer();
}
/* Get notified when a cpu comes on/off. Be hotplug friendly. */
@@ -2056,7 +2060,6 @@ static int __cpuinit
mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
- struct timer_list *t = &per_cpu(mce_timer, cpu);
switch (action) {
case CPU_ONLINE:
@@ -2073,16 +2076,10 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
- del_timer_sync(t);
smp_call_function_single(cpu, mce_disable_cpu, &action, 1);
break;
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
- if (!mce_ignore_ce && check_interval) {
- t->expires = round_jiffies(jiffies +
- __get_cpu_var(mce_next_interval));
- add_timer_on(t, cpu);
- }
smp_call_function_single(cpu, mce_reenable_cpu, &action, 1);
break;
case CPU_POST_DEAD:
diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index 787e06c84ea6..ce215616d5b9 100644
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -397,8 +397,8 @@ static void (*smp_thermal_vector)(void) = unexpected_thermal_interrupt;
asmlinkage void smp_thermal_interrupt(struct pt_regs *regs)
{
- exit_idle();
irq_enter();
+ exit_idle();
inc_irq_stat(irq_thermal_count);
smp_thermal_vector();
irq_exit();
diff --git a/arch/x86/kernel/cpu/mcheck/threshold.c b/arch/x86/kernel/cpu/mcheck/threshold.c
index d746df2909c9..aa578cadb940 100644
--- a/arch/x86/kernel/cpu/mcheck/threshold.c
+++ b/arch/x86/kernel/cpu/mcheck/threshold.c
@@ -19,8 +19,8 @@ void (*mce_threshold_vector)(void) = default_threshold_interrupt;
asmlinkage void smp_threshold_interrupt(void)
{
- exit_idle();
irq_enter();
+ exit_idle();
inc_irq_stat(irq_threshold_count);
mce_threshold_vector();
irq_exit();
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 6d728d9284bd..352beb75ef78 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -21,10 +21,14 @@
(N_EXCEPTION_STACKS + DEBUG_STKSZ/EXCEPTION_STKSZ - 2)
static char x86_stack_ids[][8] = {
+#if DEBUG_STACK > 0
[ DEBUG_STACK-1 ] = "#DB",
+#endif
[ NMI_STACK-1 ] = "NMI",
[ DOUBLEFAULT_STACK-1 ] = "#DF",
+#if STACKFAULT_STACK > 0
[ STACKFAULT_STACK-1 ] = "#SS",
+#endif
[ MCE_STACK-1 ] = "#MC",
#if DEBUG_STKSZ > EXCEPTION_STKSZ
[ N_EXCEPTION_STACKS ...
diff --git a/arch/x86/kernel/early_printk.c b/arch/x86/kernel/early_printk.c
index cd28a350f7f9..5f3d9c5e89c7 100644
--- a/arch/x86/kernel/early_printk.c
+++ b/arch/x86/kernel/early_printk.c
@@ -169,25 +169,9 @@ static struct console early_serial_console = {
.index = -1,
};
-/* Direct interface for emergencies */
-static struct console *early_console = &early_vga_console;
-static int __initdata early_console_initialized;
-
-asmlinkage void early_printk(const char *fmt, ...)
-{
- char buf[512];
- int n;
- va_list ap;
-
- va_start(ap, fmt);
- n = vscnprintf(buf, sizeof(buf), fmt, ap);
- early_console->write(early_console, buf, n);
- va_end(ap);
-}
-
static inline void early_console_register(struct console *con, int keep_early)
{
- if (early_console->index != -1) {
+ if (con->index != -1) {
printk(KERN_CRIT "ERROR: earlyprintk= %s already used\n",
con->name);
return;
@@ -207,9 +191,8 @@ static int __init setup_early_printk(char *buf)
if (!buf)
return 0;
- if (early_console_initialized)
+ if (early_console)
return 0;
- early_console_initialized = 1;
keep = (strstr(buf, "keep") != NULL);
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index f3f6f5344001..3e660d2cebb6 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -626,7 +626,11 @@ work_notifysig: # deal with pending signals and
jne work_notifysig_v86 # returning to kernel-space or
# vm86-space
xorl %edx, %edx
+ TRACE_IRQS_ON
+ ENABLE_INTERRUPTS(CLBR_NONE)
call do_notify_resume
+ DISABLE_INTERRUPTS(CLBR_ANY)
+ TRACE_IRQS_OFF
jmp resume_userspace_sig
ALIGN
@@ -639,7 +643,11 @@ work_notifysig_v86:
movl %esp, %eax
#endif
xorl %edx, %edx
+ TRACE_IRQS_ON
+ ENABLE_INTERRUPTS(CLBR_NONE)
call do_notify_resume
+ DISABLE_INTERRUPTS(CLBR_ANY)
+ TRACE_IRQS_OFF
jmp resume_userspace_sig
END(work_pending)
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index faf8d5e74b0b..fb0f57824bd8 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -1192,6 +1192,7 @@ ENTRY(kernel_execve)
CFI_ENDPROC
END(kernel_execve)
+#ifndef CONFIG_PREEMPT_RT_FULL
/* Call softirq on interrupt stack. Interrupts are off. */
ENTRY(call_softirq)
CFI_STARTPROC
@@ -1211,6 +1212,7 @@ ENTRY(call_softirq)
ret
CFI_ENDPROC
END(call_softirq)
+#endif
#ifdef CONFIG_XEN
zeroentry xen_hypervisor_callback xen_do_hypervisor_callback
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 1bb0bf4d92cd..d86b82190b80 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -9,6 +9,7 @@
#include <linux/slab.h>
#include <linux/hpet.h>
#include <linux/init.h>
+#include <linux/dmi.h>
#include <linux/cpu.h>
#include <linux/pm.h>
#include <linux/io.h>
@@ -568,6 +569,30 @@ static void init_one_hpet_msi_clockevent(struct hpet_dev *hdev, int cpu)
#define RESERVE_TIMERS 0
#endif
+static int __init dmi_disable_hpet_msi(const struct dmi_system_id *d)
+{
+ hpet_msi_disable = 1;
+ return 0;
+}
+
+static struct dmi_system_id __initdata dmi_hpet_table[] = {
+ /*
+ * MSI based per cpu timers lose interrupts when intel_idle()
+ * is enabled - independent of the c-state. With idle=poll the
+ * problem cannot be observed. We have no idea yet, whether
+ * this is a W510 specific issue or a general chipset oddity.
+ */
+ {
+ .callback = dmi_disable_hpet_msi,
+ .ident = "Lenovo W510",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W510"),
+ },
+ },
+ {}
+};
+
static void hpet_msi_capability_lookup(unsigned int start_timer)
{
unsigned int id;
@@ -575,6 +600,8 @@ static void hpet_msi_capability_lookup(unsigned int start_timer)
unsigned int num_timers_used = 0;
int i;
+ dmi_check_system(dmi_hpet_table);
+
if (hpet_msi_disable)
return;
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 429e0c92924e..5d31e5bdbf85 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -181,8 +181,8 @@ unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
unsigned vector = ~regs->orig_ax;
unsigned irq;
- exit_idle();
irq_enter();
+ exit_idle();
irq = __this_cpu_read(vector_irq[vector]);
@@ -209,10 +209,10 @@ void smp_x86_platform_ipi(struct pt_regs *regs)
ack_APIC_irq();
- exit_idle();
-
irq_enter();
+ exit_idle();
+
inc_irq_stat(x86_platform_ipis);
if (x86_platform_ipi_callback)
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index 72090705a656..84417a251c3f 100644
--- a/arch/x86/kernel/irq_32.c
+++ b/arch/x86/kernel/irq_32.c
@@ -149,6 +149,7 @@ void __cpuinit irq_ctx_init(int cpu)
cpu, per_cpu(hardirq_ctx, cpu), per_cpu(softirq_ctx, cpu));
}
+#ifndef CONFIG_PREEMPT_RT_FULL
asmlinkage void do_softirq(void)
{
unsigned long flags;
@@ -179,6 +180,7 @@ asmlinkage void do_softirq(void)
local_irq_restore(flags);
}
+#endif
bool handle_irq(unsigned irq, struct pt_regs *regs)
{
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index 69bca468c47a..3fbc07df72e1 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -65,7 +65,7 @@ bool handle_irq(unsigned irq, struct pt_regs *regs)
return true;
}
-
+#ifndef CONFIG_PREEMPT_RT_FULL
extern void call_softirq(void);
asmlinkage void do_softirq(void)
@@ -85,3 +85,4 @@ asmlinkage void do_softirq(void)
}
local_irq_restore(flags);
}
+#endif
diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c
index ca8f703a1e70..129b8bb73de2 100644
--- a/arch/x86/kernel/irq_work.c
+++ b/arch/x86/kernel/irq_work.c
@@ -18,6 +18,7 @@ void smp_irq_work_interrupt(struct pt_regs *regs)
irq_exit();
}
+#ifndef CONFIG_PREEMPT_RT_FULL
void arch_irq_work_raise(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
@@ -28,3 +29,4 @@ void arch_irq_work_raise(void)
apic_wait_icr_idle();
#endif
}
+#endif
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index 7da647d8b64c..5604455ebc75 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -478,7 +478,6 @@ static void __kprobes setup_singlestep(struct kprobe *p, struct pt_regs *regs,
* stepping.
*/
regs->ip = (unsigned long)p->ainsn.insn;
- preempt_enable_no_resched();
return;
}
#endif
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 859829614085..631bba6e5788 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -39,6 +39,7 @@
#include <linux/io.h>
#include <linux/kdebug.h>
#include <linux/cpuidle.h>
+#include <linux/highmem.h>
#include <asm/pgtable.h>
#include <asm/system.h>
@@ -117,9 +118,7 @@ void cpu_idle(void)
start_critical_timings();
}
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
@@ -341,6 +340,46 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT))
__switch_to_xtra(prev_p, next_p, tss);
+#if defined CONFIG_PREEMPT_RT_FULL && defined CONFIG_HIGHMEM
+ /*
+ * Save @prev's kmap_atomic stack
+ */
+ prev_p->kmap_idx = __this_cpu_read(__kmap_atomic_idx);
+ if (unlikely(prev_p->kmap_idx)) {
+ int i;
+
+ for (i = 0; i < prev_p->kmap_idx; i++) {
+ int idx = i + KM_TYPE_NR * smp_processor_id();
+
+ pte_t *ptep = kmap_pte - idx;
+ prev_p->kmap_pte[i] = *ptep;
+ kpte_clear_flush(ptep, __fix_to_virt(FIX_KMAP_BEGIN + idx));
+ }
+
+ __this_cpu_write(__kmap_atomic_idx, 0);
+ }
+
+ /*
+ * Restore @next_p's kmap_atomic stack
+ */
+ if (unlikely(next_p->kmap_idx)) {
+ int i;
+
+ __this_cpu_write(__kmap_atomic_idx, next_p->kmap_idx);
+
+ for (i = 0; i < next_p->kmap_idx; i++) {
+ int idx = i + KM_TYPE_NR * smp_processor_id();
+
+ set_pte(kmap_pte - idx, next_p->kmap_pte[i]);
+ }
+ }
+#endif
+
+ /* If we're going to preload the fpu context, make sure clts
+ is run while we're batching the cpu state updates. */
+ if (preload_fpu)
+ clts();
+
/*
* Leave lazy mode, flushing any hypercalls made here.
* This must be done before restoring TLS segments so
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 6a364a67e2b7..08840ab61a2e 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -150,9 +150,7 @@ void cpu_idle(void)
}
tick_nohz_restart_sched_tick();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 54ddaeb221c1..12c4d53e09a1 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -820,6 +820,15 @@ do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags)
mce_notify_process();
#endif /* CONFIG_X86_64 && CONFIG_X86_MCE */
+#ifdef ARCH_RT_DELAYS_SIGNAL_SEND
+ if (unlikely(current->forced_info.si_signo)) {
+ struct task_struct *t = current;
+ force_sig_info(t->forced_info.si_signo,
+ &t->forced_info, t);
+ t->forced_info.si_signo = 0;
+ }
+#endif
+
/* deal with pending signal delivery */
if (thread_info_flags & _TIF_SIGPENDING)
do_signal(regs);
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 31d9d0f04c2b..cc88aec09888 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -87,9 +87,21 @@ static inline void conditional_sti(struct pt_regs *regs)
local_irq_enable();
}
-static inline void preempt_conditional_sti(struct pt_regs *regs)
+static inline void conditional_sti_ist(struct pt_regs *regs)
{
+#ifdef CONFIG_X86_64
+ /*
+ * X86_64 uses a per CPU stack on the IST for certain traps
+ * like int3. The task can not be preempted when using one
+ * of these stacks, thus preemption must be disabled, otherwise
+ * the stack can be corrupted if the task is scheduled out,
+ * and another task comes in and uses this stack.
+ *
+ * On x86_32 the task keeps its own stack and it is OK if the
+ * task schedules out.
+ */
inc_preempt_count();
+#endif
if (regs->flags & X86_EFLAGS_IF)
local_irq_enable();
}
@@ -100,11 +112,13 @@ static inline void conditional_cli(struct pt_regs *regs)
local_irq_disable();
}
-static inline void preempt_conditional_cli(struct pt_regs *regs)
+static inline void conditional_cli_ist(struct pt_regs *regs)
{
if (regs->flags & X86_EFLAGS_IF)
local_irq_disable();
+#ifdef CONFIG_X86_64
dec_preempt_count();
+#endif
}
static void __kprobes
@@ -222,9 +236,9 @@ dotraplinkage void do_stack_segment(struct pt_regs *regs, long error_code)
if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
12, SIGBUS) == NOTIFY_STOP)
return;
- preempt_conditional_sti(regs);
+ conditional_sti_ist(regs);
do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
- preempt_conditional_cli(regs);
+ conditional_cli_ist(regs);
}
dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code)
@@ -316,9 +330,9 @@ dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
return;
#endif
- preempt_conditional_sti(regs);
+ conditional_sti_ist(regs);
do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
- preempt_conditional_cli(regs);
+ conditional_cli_ist(regs);
}
#ifdef CONFIG_X86_64
@@ -412,12 +426,12 @@ dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
return;
/* It's safe to allow irq's after DR6 has been saved */
- preempt_conditional_sti(regs);
+ conditional_sti_ist(regs);
if (regs->flags & X86_VM_MASK) {
handle_vm86_trap((struct kernel_vm86_regs *) regs,
error_code, 1);
- preempt_conditional_cli(regs);
+ conditional_cli_ist(regs);
return;
}
@@ -436,7 +450,7 @@ dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
si_code = get_si_code(tsk->thread.debugreg6);
if (tsk->thread.debugreg6 & (DR_STEP | DR_TRAP_BITS) || user_icebp)
send_sigtrap(tsk, regs, error_code, si_code);
- preempt_conditional_cli(regs);
+ conditional_cli_ist(regs);
return;
}
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index e4d4a22e8b94..aad7aaf319e1 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -54,7 +54,7 @@
DEFINE_VVAR(int, vgetcpu_mode);
DEFINE_VVAR(struct vsyscall_gtod_data, vsyscall_gtod_data) =
{
- .lock = __SEQLOCK_UNLOCKED(__vsyscall_gtod_data.lock),
+ .lock = __RAW_SEQLOCK_UNLOCKED(__vsyscall_gtod_data.lock),
};
static enum { EMULATE, NATIVE, NONE } vsyscall_mode = NATIVE;
@@ -82,10 +82,10 @@ void update_vsyscall_tz(void)
{
unsigned long flags;
- write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
+ raw_write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
/* sys_tz has changed */
vsyscall_gtod_data.sys_tz = sys_tz;
- write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
+ raw_write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
}
void update_vsyscall(struct timespec *wall_time, struct timespec *wtm,
@@ -93,7 +93,7 @@ void update_vsyscall(struct timespec *wall_time, struct timespec *wtm,
{
unsigned long flags;
- write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
+ raw_write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
/* copy vsyscall data */
vsyscall_gtod_data.clock.vclock_mode = clock->archdata.vclock_mode;
@@ -106,7 +106,7 @@ void update_vsyscall(struct timespec *wall_time, struct timespec *wtm,
vsyscall_gtod_data.wall_to_monotonic = *wtm;
vsyscall_gtod_data.wall_time_coarse = __current_kernel_time();
- write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
+ raw_write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
}
static void warn_bad_vsyscall(const char *level, struct pt_regs *regs,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4c938da2ba00..9aac6d69bffa 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5184,6 +5184,13 @@ int kvm_arch_init(void *opaque)
goto out;
}
+#ifdef CONFIG_PREEMPT_RT_FULL
+ if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) {
+ printk(KERN_ERR "RT requires X86_FEATURE_CONSTANT_TSC\n");
+ return -EOPNOTSUPP;
+ }
+#endif
+
r = kvm_mmu_module_init();
if (r)
goto out;
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 5db0490deb07..b567837c8374 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1084,7 +1084,7 @@ do_page_fault(struct pt_regs *regs, unsigned long error_code)
* If we're in an interrupt, have no user context or are running
* in an atomic region then we must not take the fault:
*/
- if (unlikely(in_atomic() || !mm)) {
+ if (unlikely(!mm || pagefault_disabled())) {
bad_area_nosemaphore(regs, error_code, address);
return;
}
diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c
index f4f29b19fac5..71bd7d64e63c 100644
--- a/arch/x86/mm/highmem_32.c
+++ b/arch/x86/mm/highmem_32.c
@@ -43,7 +43,7 @@ void *kmap_atomic_prot(struct page *page, pgprot_t prot)
type = kmap_atomic_idx_push();
idx = type + KM_TYPE_NR*smp_processor_id();
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
- BUG_ON(!pte_none(*(kmap_pte-idx)));
+ WARN_ON(!pte_none(*(kmap_pte-idx)));
set_pte(kmap_pte-idx, mk_pte(page, prot));
arch_flush_lazy_mmu_mode();
diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 47041e7c088c..2c9004770c4e 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -113,9 +113,7 @@ void cpu_idle(void)
while (1) {
while (!need_resched())
platform_idle();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
+ schedule_preempt_disabled();
}
}
diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c
index e367e3026436..8f3f52a7d82e 100644
--- a/arch/xtensa/mm/fault.c
+++ b/arch/xtensa/mm/fault.c
@@ -57,7 +57,7 @@ void do_page_fault(struct pt_regs *regs)
/* If we're in an interrupt or have no user
* context, we must not take the fault..
*/
- if (in_atomic() || !mm) {
+ if (!mm || pagefault_disabled()) {
bad_page_fault(regs, address, SIGSEGV);
return;
}