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-rw-r--r--kernel/auditsc.c2
-rw-r--r--kernel/debug/debug_core.c5
-rw-r--r--kernel/debug/debug_core.h2
-rw-r--r--kernel/hung_task.c6
-rw-r--r--kernel/irq/Kconfig1
-rw-r--r--kernel/kmod.c2
-rw-r--r--kernel/sched/core.c6
-rw-r--r--kernel/sched/deadline.c3
-rw-r--r--kernel/smp.c68
-rw-r--r--kernel/softirq.c2
-rw-r--r--kernel/sysctl.c7
-rw-r--r--kernel/time/tick-sched.c27
12 files changed, 50 insertions, 81 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 10176cd5956a..7aef2f4b6c64 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1719,7 +1719,7 @@ void audit_putname(struct filename *name)
struct audit_context *context = current->audit_context;
BUG_ON(!context);
- if (!context->in_syscall) {
+ if (!name->aname || !context->in_syscall) {
#if AUDIT_DEBUG == 2
printk(KERN_ERR "%s:%d(:%d): final_putname(%p)\n",
__FILE__, __LINE__, context->serial, name);
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index 7d2f35e5df2f..334b3980ffc1 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -736,7 +736,8 @@ int kgdb_nmicallback(int cpu, void *regs)
return 1;
}
-int kgdb_nmicallin(int cpu, int trapnr, void *regs, atomic_t *send_ready)
+int kgdb_nmicallin(int cpu, int trapnr, void *regs, int err_code,
+ atomic_t *send_ready)
{
#ifdef CONFIG_SMP
if (!kgdb_io_ready(0) || !send_ready)
@@ -750,7 +751,7 @@ int kgdb_nmicallin(int cpu, int trapnr, void *regs, atomic_t *send_ready)
ks->cpu = cpu;
ks->ex_vector = trapnr;
ks->signo = SIGTRAP;
- ks->err_code = KGDB_KDB_REASON_SYSTEM_NMI;
+ ks->err_code = err_code;
ks->linux_regs = regs;
ks->send_ready = send_ready;
kgdb_cpu_enter(ks, regs, DCPU_WANT_MASTER);
diff --git a/kernel/debug/debug_core.h b/kernel/debug/debug_core.h
index 572aa4f5677c..127d9bc49fb4 100644
--- a/kernel/debug/debug_core.h
+++ b/kernel/debug/debug_core.h
@@ -75,13 +75,11 @@ extern int kdb_stub(struct kgdb_state *ks);
extern int kdb_parse(const char *cmdstr);
extern int kdb_common_init_state(struct kgdb_state *ks);
extern int kdb_common_deinit_state(void);
-#define KGDB_KDB_REASON_SYSTEM_NMI KDB_REASON_SYSTEM_NMI
#else /* ! CONFIG_KGDB_KDB */
static inline int kdb_stub(struct kgdb_state *ks)
{
return DBG_PASS_EVENT;
}
-#define KGDB_KDB_REASON_SYSTEM_NMI 0
#endif /* CONFIG_KGDB_KDB */
#endif /* _DEBUG_CORE_H_ */
diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index 9328b80eaf14..0b9c169d577f 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -37,7 +37,7 @@ int __read_mostly sysctl_hung_task_check_count = PID_MAX_LIMIT;
*/
unsigned long __read_mostly sysctl_hung_task_timeout_secs = CONFIG_DEFAULT_HUNG_TASK_TIMEOUT;
-unsigned long __read_mostly sysctl_hung_task_warnings = 10;
+int __read_mostly sysctl_hung_task_warnings = 10;
static int __read_mostly did_panic;
@@ -98,7 +98,9 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout)
if (!sysctl_hung_task_warnings)
return;
- sysctl_hung_task_warnings--;
+
+ if (sysctl_hung_task_warnings > 0)
+ sysctl_hung_task_warnings--;
/*
* Ok, the task did not get scheduled for more than 2 minutes,
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index 4a1fef09f658..07cbdfea9ae2 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -40,6 +40,7 @@ config IRQ_EDGE_EOI_HANDLER
# Generic configurable interrupt chip implementation
config GENERIC_IRQ_CHIP
bool
+ select IRQ_DOMAIN
# Generic irq_domain hw <--> linux irq number translation
config IRQ_DOMAIN
diff --git a/kernel/kmod.c b/kernel/kmod.c
index b086006c59e7..6b375af4958d 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -239,7 +239,7 @@ static int ____call_usermodehelper(void *data)
commit_creds(new);
- retval = do_execve(sub_info->path,
+ retval = do_execve(getname_kernel(sub_info->path),
(const char __user *const __user *)sub_info->argv,
(const char __user *const __user *)sub_info->envp);
if (!retval)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 7fea865a810d..b46131ef6aab 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2476,7 +2476,7 @@ u64 scheduler_tick_max_deferment(void)
if (time_before_eq(next, now))
return 0;
- return jiffies_to_usecs(next - now) * NSEC_PER_USEC;
+ return jiffies_to_nsecs(next - now);
}
#endif
@@ -4347,7 +4347,9 @@ SYSCALL_DEFINE2(sched_rr_get_interval, pid_t, pid,
goto out_unlock;
rq = task_rq_lock(p, &flags);
- time_slice = p->sched_class->get_rr_interval(rq, p);
+ time_slice = 0;
+ if (p->sched_class->get_rr_interval)
+ time_slice = p->sched_class->get_rr_interval(rq, p);
task_rq_unlock(rq, p, &flags);
rcu_read_unlock();
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 0de248202879..0dd5e0971a07 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -351,7 +351,8 @@ static void replenish_dl_entity(struct sched_dl_entity *dl_se,
* disrupting the schedulability of the system. Otherwise, we should
* refill the runtime and set the deadline a period in the future,
* because keeping the current (absolute) deadline of the task would
- * result in breaking guarantees promised to other tasks.
+ * result in breaking guarantees promised to other tasks (refer to
+ * Documentation/scheduler/sched-deadline.txt for more informations).
*
* This function returns true if:
*
diff --git a/kernel/smp.c b/kernel/smp.c
index bd9f94028838..ffee35bef179 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -23,17 +23,11 @@ enum {
struct call_function_data {
struct call_single_data __percpu *csd;
cpumask_var_t cpumask;
- cpumask_var_t cpumask_ipi;
};
static DEFINE_PER_CPU_SHARED_ALIGNED(struct call_function_data, cfd_data);
-struct call_single_queue {
- struct list_head list;
- raw_spinlock_t lock;
-};
-
-static DEFINE_PER_CPU_SHARED_ALIGNED(struct call_single_queue, call_single_queue);
+static DEFINE_PER_CPU_SHARED_ALIGNED(struct llist_head, call_single_queue);
static int
hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu)
@@ -47,14 +41,8 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu)
if (!zalloc_cpumask_var_node(&cfd->cpumask, GFP_KERNEL,
cpu_to_node(cpu)))
return notifier_from_errno(-ENOMEM);
- if (!zalloc_cpumask_var_node(&cfd->cpumask_ipi, GFP_KERNEL,
- cpu_to_node(cpu))) {
- free_cpumask_var(cfd->cpumask);
- return notifier_from_errno(-ENOMEM);
- }
cfd->csd = alloc_percpu(struct call_single_data);
if (!cfd->csd) {
- free_cpumask_var(cfd->cpumask_ipi);
free_cpumask_var(cfd->cpumask);
return notifier_from_errno(-ENOMEM);
}
@@ -67,7 +55,6 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu)
case CPU_DEAD:
case CPU_DEAD_FROZEN:
free_cpumask_var(cfd->cpumask);
- free_cpumask_var(cfd->cpumask_ipi);
free_percpu(cfd->csd);
break;
#endif
@@ -85,12 +72,8 @@ void __init call_function_init(void)
void *cpu = (void *)(long)smp_processor_id();
int i;
- for_each_possible_cpu(i) {
- struct call_single_queue *q = &per_cpu(call_single_queue, i);
-
- raw_spin_lock_init(&q->lock);
- INIT_LIST_HEAD(&q->list);
- }
+ for_each_possible_cpu(i)
+ init_llist_head(&per_cpu(call_single_queue, i));
hotplug_cfd(&hotplug_cfd_notifier, CPU_UP_PREPARE, cpu);
register_cpu_notifier(&hotplug_cfd_notifier);
@@ -141,18 +124,9 @@ static void csd_unlock(struct call_single_data *csd)
*/
static void generic_exec_single(int cpu, struct call_single_data *csd, int wait)
{
- struct call_single_queue *dst = &per_cpu(call_single_queue, cpu);
- unsigned long flags;
- int ipi;
-
if (wait)
csd->flags |= CSD_FLAG_WAIT;
- raw_spin_lock_irqsave(&dst->lock, flags);
- ipi = list_empty(&dst->list);
- list_add_tail(&csd->list, &dst->list);
- raw_spin_unlock_irqrestore(&dst->lock, flags);
-
/*
* The list addition should be visible before sending the IPI
* handler locks the list to pull the entry off it because of
@@ -164,7 +138,7 @@ static void generic_exec_single(int cpu, struct call_single_data *csd, int wait)
* locking and barrier primitives. Generic code isn't really
* equipped to do the right thing...
*/
- if (ipi)
+ if (llist_add(&csd->llist, &per_cpu(call_single_queue, cpu)))
arch_send_call_function_single_ipi(cpu);
if (wait)
@@ -177,27 +151,26 @@ static void generic_exec_single(int cpu, struct call_single_data *csd, int wait)
*/
void generic_smp_call_function_single_interrupt(void)
{
- struct call_single_queue *q = &__get_cpu_var(call_single_queue);
- LIST_HEAD(list);
+ struct llist_node *entry, *next;
/*
* Shouldn't receive this interrupt on a cpu that is not yet online.
*/
WARN_ON_ONCE(!cpu_online(smp_processor_id()));
- raw_spin_lock(&q->lock);
- list_replace_init(&q->list, &list);
- raw_spin_unlock(&q->lock);
+ entry = llist_del_all(&__get_cpu_var(call_single_queue));
+ entry = llist_reverse_order(entry);
- while (!list_empty(&list)) {
+ while (entry) {
struct call_single_data *csd;
- csd = list_entry(list.next, struct call_single_data, list);
- list_del(&csd->list);
+ next = entry->next;
+ csd = llist_entry(entry, struct call_single_data, llist);
csd->func(csd->info);
-
csd_unlock(csd);
+
+ entry = next;
}
}
@@ -402,30 +375,17 @@ void smp_call_function_many(const struct cpumask *mask,
if (unlikely(!cpumask_weight(cfd->cpumask)))
return;
- /*
- * After we put an entry into the list, cfd->cpumask may be cleared
- * again when another CPU sends another IPI for a SMP function call, so
- * cfd->cpumask will be zero.
- */
- cpumask_copy(cfd->cpumask_ipi, cfd->cpumask);
-
for_each_cpu(cpu, cfd->cpumask) {
struct call_single_data *csd = per_cpu_ptr(cfd->csd, cpu);
- struct call_single_queue *dst =
- &per_cpu(call_single_queue, cpu);
- unsigned long flags;
csd_lock(csd);
csd->func = func;
csd->info = info;
-
- raw_spin_lock_irqsave(&dst->lock, flags);
- list_add_tail(&csd->list, &dst->list);
- raw_spin_unlock_irqrestore(&dst->lock, flags);
+ llist_add(&csd->llist, &per_cpu(call_single_queue, cpu));
}
/* Send a message to all CPUs in the map */
- arch_send_call_function_ipi_mask(cfd->cpumask_ipi);
+ arch_send_call_function_ipi_mask(cfd->cpumask);
if (wait) {
for_each_cpu(cpu, cfd->cpumask) {
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 850967068aaf..490fcbb1dc5b 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -328,7 +328,7 @@ void irq_enter(void)
* here, as softirq will be serviced on return from interrupt.
*/
local_bh_disable();
- tick_check_idle();
+ tick_irq_enter();
_local_bh_enable();
}
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 096db7452cbd..49e13e1f8fe6 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -121,6 +121,8 @@ extern int blk_iopoll_enabled;
static int sixty = 60;
#endif
+static int __maybe_unused neg_one = -1;
+
static int zero;
static int __maybe_unused one = 1;
static int __maybe_unused two = 2;
@@ -997,9 +999,10 @@ static struct ctl_table kern_table[] = {
{
.procname = "hung_task_warnings",
.data = &sysctl_hung_task_warnings,
- .maxlen = sizeof(unsigned long),
+ .maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_doulongvec_minmax,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &neg_one,
},
#endif
#ifdef CONFIG_COMPAT
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 08cb0c3b8ccb..9f8af69c67ec 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -533,12 +533,13 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev;
u64 time_delta;
+ time_delta = timekeeping_max_deferment();
+
/* Read jiffies and the time when jiffies were updated last */
do {
seq = read_seqbegin(&jiffies_lock);
last_update = last_jiffies_update;
last_jiffies = jiffies;
- time_delta = timekeeping_max_deferment();
} while (read_seqretry(&jiffies_lock, seq));
if (rcu_needs_cpu(cpu, &rcu_delta_jiffies) ||
@@ -678,18 +679,18 @@ out:
static void tick_nohz_full_stop_tick(struct tick_sched *ts)
{
#ifdef CONFIG_NO_HZ_FULL
- int cpu = smp_processor_id();
+ int cpu = smp_processor_id();
- if (!tick_nohz_full_cpu(cpu) || is_idle_task(current))
- return;
+ if (!tick_nohz_full_cpu(cpu) || is_idle_task(current))
+ return;
- if (!ts->tick_stopped && ts->nohz_mode == NOHZ_MODE_INACTIVE)
- return;
+ if (!ts->tick_stopped && ts->nohz_mode == NOHZ_MODE_INACTIVE)
+ return;
- if (!can_stop_full_tick())
- return;
+ if (!can_stop_full_tick())
+ return;
- tick_nohz_stop_sched_tick(ts, ktime_get(), cpu);
+ tick_nohz_stop_sched_tick(ts, ktime_get(), cpu);
#endif
}
@@ -1023,7 +1024,7 @@ static void tick_nohz_kick_tick(struct tick_sched *ts, ktime_t now)
#endif
}
-static inline void tick_check_nohz_this_cpu(void)
+static inline void tick_nohz_irq_enter(void)
{
struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
ktime_t now;
@@ -1042,17 +1043,17 @@ static inline void tick_check_nohz_this_cpu(void)
#else
static inline void tick_nohz_switch_to_nohz(void) { }
-static inline void tick_check_nohz_this_cpu(void) { }
+static inline void tick_nohz_irq_enter(void) { }
#endif /* CONFIG_NO_HZ_COMMON */
/*
* Called from irq_enter to notify about the possible interruption of idle()
*/
-void tick_check_idle(void)
+void tick_irq_enter(void)
{
tick_check_oneshot_broadcast_this_cpu();
- tick_check_nohz_this_cpu();
+ tick_nohz_irq_enter();
}
/*
generated by cgit v1.2.3 (git 2.0.4) at 2025-09-14 17:28:26 +0000