diff options
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 7 | ||||
| -rw-r--r-- | arch/arm/kernel/head-common.S | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/smp_scu.c | 4 | ||||
| -rw-r--r-- | arch/arm/kernel/traps.c | 4 |
4 files changed, 11 insertions, 6 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 0022b4d57f8b..d2903e3bc861 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -21,6 +21,7 @@ #include <mach/entry-macro.S> #include <asm/thread_notify.h> #include <asm/unwind.h> +#include <asm/unistd.h> #include "entry-header.S" @@ -908,10 +909,10 @@ __kuser_cmpxchg: @ 0xffff0fc0 * A special ghost syscall is used for that (see traps.c). */ stmfd sp!, {r7, lr} - mov r7, #0xff00 @ 0xfff0 into r7 for EABI - orr r7, r7, #0xf0 - swi #0x9ffff0 + ldr r7, =1f @ it's 20 bits + swi __ARM_NR_cmpxchg ldmfd sp!, {r7, pc} +1: .word __ARM_NR_cmpxchg #elif __LINUX_ARM_ARCH__ < 6 diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S index 885a7214418d..b9505aa267c0 100644 --- a/arch/arm/kernel/head-common.S +++ b/arch/arm/kernel/head-common.S @@ -97,7 +97,7 @@ __error_a: bl printhex8 adr r0, str_a2 bl printascii - adr r3, 3f + adr r3, 4f ldmia r3, {r4, r5, r6} @ get machine desc list sub r4, r3, r4 @ get offset between virt&phys add r5, r5, r4 @ convert virt addresses to diff --git a/arch/arm/kernel/smp_scu.c b/arch/arm/kernel/smp_scu.c index d3831f616ee9..9ab4149bd983 100644 --- a/arch/arm/kernel/smp_scu.c +++ b/arch/arm/kernel/smp_scu.c @@ -37,6 +37,10 @@ void __init scu_enable(void __iomem *scu_base) u32 scu_ctrl; scu_ctrl = __raw_readl(scu_base + SCU_CTRL); + /* already enabled? */ + if (scu_ctrl & 1) + return; + scu_ctrl |= 1; __raw_writel(scu_ctrl, scu_base + SCU_CTRL); diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 95718a6b50a6..3f361a783f43 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -528,7 +528,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs) * __kuser_cmpxchg code in entry-armv.S should be aware of its * existence. Don't ever use this from user code. */ - case 0xfff0: + case NR(cmpxchg): for (;;) { extern void do_DataAbort(unsigned long addr, unsigned int fsr, struct pt_regs *regs); @@ -573,7 +573,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs) if not implemented, rather than raising SIGILL. This way the calling program can gracefully determine whether a feature is supported. */ - if (no <= 0x7ff) + if ((no & 0xffff) <= 0x7ff) return -ENOSYS; break; } |