summaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'kernel')
-rw-r--r--kernel/compat.c15
-rw-r--r--kernel/hrtimer.c22
-rw-r--r--kernel/posix-cpu-timers.c30
-rw-r--r--kernel/time/clocksource.c18
-rw-r--r--kernel/time/tick-sched.c6
-rw-r--r--kernel/timer.c16
-rw-r--r--kernel/workqueue.c2
7 files changed, 54 insertions, 55 deletions
diff --git a/kernel/compat.c b/kernel/compat.c
index 5f0e201bcfd..9c48abfcd4a 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -47,15 +47,14 @@ static long compat_nanosleep_restart(struct restart_block *restart)
mm_segment_t oldfs;
long ret;
- rmtp = (struct compat_timespec __user *)(restart->arg1);
- restart->arg1 = (unsigned long)&rmt;
+ restart->nanosleep.rmtp = (struct timespec __user *) &rmt;
oldfs = get_fs();
set_fs(KERNEL_DS);
ret = hrtimer_nanosleep_restart(restart);
set_fs(oldfs);
if (ret) {
- restart->arg1 = (unsigned long)rmtp;
+ rmtp = restart->nanosleep.compat_rmtp;
if (rmtp && put_compat_timespec(&rmt, rmtp))
return -EFAULT;
@@ -89,7 +88,7 @@ asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
= &current_thread_info()->restart_block;
restart->fn = compat_nanosleep_restart;
- restart->arg1 = (unsigned long)rmtp;
+ restart->nanosleep.compat_rmtp = rmtp;
if (rmtp && put_compat_timespec(&rmt, rmtp))
return -EFAULT;
@@ -607,9 +606,9 @@ static long compat_clock_nanosleep_restart(struct restart_block *restart)
long err;
mm_segment_t oldfs;
struct timespec tu;
- struct compat_timespec *rmtp = (struct compat_timespec *)(restart->arg1);
+ struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp;
- restart->arg1 = (unsigned long) &tu;
+ restart->nanosleep.rmtp = (struct timespec __user *) &tu;
oldfs = get_fs();
set_fs(KERNEL_DS);
err = clock_nanosleep_restart(restart);
@@ -621,7 +620,7 @@ static long compat_clock_nanosleep_restart(struct restart_block *restart)
if (err == -ERESTART_RESTARTBLOCK) {
restart->fn = compat_clock_nanosleep_restart;
- restart->arg1 = (unsigned long) rmtp;
+ restart->nanosleep.compat_rmtp = rmtp;
}
return err;
}
@@ -652,7 +651,7 @@ long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
if (err == -ERESTART_RESTARTBLOCK) {
restart = &current_thread_info()->restart_block;
restart->fn = compat_clock_nanosleep_restart;
- restart->arg1 = (unsigned long) rmtp;
+ restart->nanosleep.compat_rmtp = rmtp;
}
return err;
}
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 98bee013f71..c642ef75069 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1354,13 +1354,13 @@ long __sched hrtimer_nanosleep_restart(struct restart_block *restart)
struct hrtimer_sleeper t;
struct timespec __user *rmtp;
- hrtimer_init(&t.timer, restart->arg0, HRTIMER_MODE_ABS);
- t.timer.expires.tv64 = ((u64)restart->arg3 << 32) | (u64) restart->arg2;
+ hrtimer_init(&t.timer, restart->nanosleep.index, HRTIMER_MODE_ABS);
+ t.timer.expires.tv64 = restart->nanosleep.expires;
if (do_nanosleep(&t, HRTIMER_MODE_ABS))
return 0;
- rmtp = (struct timespec __user *)restart->arg1;
+ rmtp = restart->nanosleep.rmtp;
if (rmtp) {
int ret = update_rmtp(&t.timer, rmtp);
if (ret <= 0)
@@ -1394,10 +1394,9 @@ long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp,
restart = &current_thread_info()->restart_block;
restart->fn = hrtimer_nanosleep_restart;
- restart->arg0 = (unsigned long) t.timer.base->index;
- restart->arg1 = (unsigned long) rmtp;
- restart->arg2 = t.timer.expires.tv64 & 0xFFFFFFFF;
- restart->arg3 = t.timer.expires.tv64 >> 32;
+ restart->nanosleep.index = t.timer.base->index;
+ restart->nanosleep.rmtp = rmtp;
+ restart->nanosleep.expires = t.timer.expires.tv64;
return -ERESTART_RESTARTBLOCK;
}
@@ -1425,7 +1424,6 @@ static void __cpuinit init_hrtimers_cpu(int cpu)
int i;
spin_lock_init(&cpu_base->lock);
- lockdep_set_class(&cpu_base->lock, &cpu_base->lock_key);
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++)
cpu_base->clock_base[i].cpu_base = cpu_base;
@@ -1466,16 +1464,16 @@ static void migrate_hrtimers(int cpu)
tick_cancel_sched_timer(cpu);
local_irq_disable();
- double_spin_lock(&new_base->lock, &old_base->lock,
- smp_processor_id() < cpu);
+ spin_lock(&new_base->lock);
+ spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING);
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
migrate_hrtimer_list(&old_base->clock_base[i],
&new_base->clock_base[i]);
}
- double_spin_unlock(&new_base->lock, &old_base->lock,
- smp_processor_id() < cpu);
+ spin_unlock(&old_base->lock);
+ spin_unlock(&new_base->lock);
local_irq_enable();
put_cpu_var(hrtimer_bases);
}
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 2eae91f954c..ae5c6c147c4 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -1087,45 +1087,45 @@ static void check_process_timers(struct task_struct *tsk,
maxfire = 20;
prof_expires = cputime_zero;
while (!list_empty(timers)) {
- struct cpu_timer_list *t = list_first_entry(timers,
+ struct cpu_timer_list *tl = list_first_entry(timers,
struct cpu_timer_list,
entry);
- if (!--maxfire || cputime_lt(ptime, t->expires.cpu)) {
- prof_expires = t->expires.cpu;
+ if (!--maxfire || cputime_lt(ptime, tl->expires.cpu)) {
+ prof_expires = tl->expires.cpu;
break;
}
- t->firing = 1;
- list_move_tail(&t->entry, firing);
+ tl->firing = 1;
+ list_move_tail(&tl->entry, firing);
}
++timers;
maxfire = 20;
virt_expires = cputime_zero;
while (!list_empty(timers)) {
- struct cpu_timer_list *t = list_first_entry(timers,
+ struct cpu_timer_list *tl = list_first_entry(timers,
struct cpu_timer_list,
entry);
- if (!--maxfire || cputime_lt(utime, t->expires.cpu)) {
- virt_expires = t->expires.cpu;
+ if (!--maxfire || cputime_lt(utime, tl->expires.cpu)) {
+ virt_expires = tl->expires.cpu;
break;
}
- t->firing = 1;
- list_move_tail(&t->entry, firing);
+ tl->firing = 1;
+ list_move_tail(&tl->entry, firing);
}
++timers;
maxfire = 20;
sched_expires = 0;
while (!list_empty(timers)) {
- struct cpu_timer_list *t = list_first_entry(timers,
+ struct cpu_timer_list *tl = list_first_entry(timers,
struct cpu_timer_list,
entry);
- if (!--maxfire || sum_sched_runtime < t->expires.sched) {
- sched_expires = t->expires.sched;
+ if (!--maxfire || sum_sched_runtime < tl->expires.sched) {
+ sched_expires = tl->expires.sched;
break;
}
- t->firing = 1;
- list_move_tail(&t->entry, firing);
+ tl->firing = 1;
+ list_move_tail(&tl->entry, firing);
}
/*
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index f61402b1f2d..73961f35fdc 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -141,8 +141,16 @@ static void clocksource_watchdog(unsigned long data)
}
if (!list_empty(&watchdog_list)) {
- __mod_timer(&watchdog_timer,
- watchdog_timer.expires + WATCHDOG_INTERVAL);
+ /*
+ * Cycle through CPUs to check if the CPUs stay
+ * synchronized to each other.
+ */
+ int next_cpu = next_cpu(raw_smp_processor_id(), cpu_online_map);
+
+ if (next_cpu >= NR_CPUS)
+ next_cpu = first_cpu(cpu_online_map);
+ watchdog_timer.expires += WATCHDOG_INTERVAL;
+ add_timer_on(&watchdog_timer, next_cpu);
}
spin_unlock(&watchdog_lock);
}
@@ -164,7 +172,8 @@ static void clocksource_check_watchdog(struct clocksource *cs)
if (!started && watchdog) {
watchdog_last = watchdog->read();
watchdog_timer.expires = jiffies + WATCHDOG_INTERVAL;
- add_timer(&watchdog_timer);
+ add_timer_on(&watchdog_timer,
+ first_cpu(cpu_online_map));
}
} else {
if (cs->flags & CLOCK_SOURCE_IS_CONTINUOUS)
@@ -185,7 +194,8 @@ static void clocksource_check_watchdog(struct clocksource *cs)
watchdog_last = watchdog->read();
watchdog_timer.expires =
jiffies + WATCHDOG_INTERVAL;
- add_timer(&watchdog_timer);
+ add_timer_on(&watchdog_timer,
+ first_cpu(cpu_online_map));
}
}
}
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 686da821d37..69dba0c7172 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -158,9 +158,8 @@ void tick_nohz_stop_idle(int cpu)
}
}
-static ktime_t tick_nohz_start_idle(int cpu)
+static ktime_t tick_nohz_start_idle(struct tick_sched *ts)
{
- struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
ktime_t now, delta;
now = ktime_get();
@@ -201,8 +200,8 @@ void tick_nohz_stop_sched_tick(void)
local_irq_save(flags);
cpu = smp_processor_id();
- now = tick_nohz_start_idle(cpu);
ts = &per_cpu(tick_cpu_sched, cpu);
+ now = tick_nohz_start_idle(ts);
/*
* If this cpu is offline and it is the one which updates
@@ -222,7 +221,6 @@ void tick_nohz_stop_sched_tick(void)
if (need_resched())
goto end;
- cpu = smp_processor_id();
if (unlikely(local_softirq_pending())) {
static int ratelimit;
diff --git a/kernel/timer.c b/kernel/timer.c
index b024106daa7..f3d35d4ea42 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1228,13 +1228,6 @@ asmlinkage long sys_sysinfo(struct sysinfo __user *info)
return 0;
}
-/*
- * lockdep: we want to track each per-CPU base as a separate lock-class,
- * but timer-bases are kmalloc()-ed, so we need to attach separate
- * keys to them:
- */
-static struct lock_class_key base_lock_keys[NR_CPUS];
-
static int __cpuinit init_timers_cpu(int cpu)
{
int j;
@@ -1277,7 +1270,6 @@ static int __cpuinit init_timers_cpu(int cpu)
}
spin_lock_init(&base->lock);
- lockdep_set_class(&base->lock, base_lock_keys + cpu);
for (j = 0; j < TVN_SIZE; j++) {
INIT_LIST_HEAD(base->tv5.vec + j);
@@ -1316,8 +1308,8 @@ static void __cpuinit migrate_timers(int cpu)
new_base = get_cpu_var(tvec_bases);
local_irq_disable();
- double_spin_lock(&new_base->lock, &old_base->lock,
- smp_processor_id() < cpu);
+ spin_lock(&new_base->lock);
+ spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING);
BUG_ON(old_base->running_timer);
@@ -1330,8 +1322,8 @@ static void __cpuinit migrate_timers(int cpu)
migrate_timer_list(new_base, old_base->tv5.vec + i);
}
- double_spin_unlock(&new_base->lock, &old_base->lock,
- smp_processor_id() < cpu);
+ spin_unlock(&old_base->lock);
+ spin_unlock(&new_base->lock);
local_irq_enable();
put_cpu_var(tvec_bases);
}
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index ff06611655a..00ff4d08e37 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -219,6 +219,7 @@ int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
struct timer_list *timer = &dwork->timer;
struct work_struct *work = &dwork->work;
+ timer_stats_timer_set_start_info(&dwork->timer);
if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) {
BUG_ON(timer_pending(timer));
BUG_ON(!list_empty(&work->entry));
@@ -580,6 +581,7 @@ EXPORT_SYMBOL(schedule_delayed_work);
int schedule_delayed_work_on(int cpu,
struct delayed_work *dwork, unsigned long delay)
{
+ timer_stats_timer_set_start_info(&dwork->timer);
return queue_delayed_work_on(cpu, keventd_wq, dwork, delay);
}
EXPORT_SYMBOL(schedule_delayed_work_on);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-24 20:39:34 +0000