Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: hrtimers: Reorder clock bases hrtimers: Avoid touching inactive timer bases hrtimers: Make struct hrtimer_cpu_base layout less stupid timerfd: Manage cancelable timers in timerfd clockevents: Move C3 stop test outside lock alarmtimer: Drop device refcount after rtc_open() alarmtimer: Check return value of class_find_device() timerfd: Allow timers to be cancelled when clock was set hrtimers: Prepare for cancel on clock was set timers
This commit is contained in:
Linus Torvalds
Коммит
30cb6d5f2e
102
fs/timerfd.c
102
fs/timerfd.c
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@ -22,16 +22,24 @@
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#include <linux/anon_inodes.h>
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#include <linux/timerfd.h>
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#include <linux/syscalls.h>
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#include <linux/rcupdate.h>
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struct timerfd_ctx {
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struct hrtimer tmr;
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ktime_t tintv;
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ktime_t moffs;
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wait_queue_head_t wqh;
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u64 ticks;
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int expired;
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int clockid;
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struct rcu_head rcu;
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struct list_head clist;
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bool might_cancel;
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};
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static LIST_HEAD(cancel_list);
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static DEFINE_SPINLOCK(cancel_lock);
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/*
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* This gets called when the timer event triggers. We set the "expired"
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* flag, but we do not re-arm the timer (in case it's necessary,
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@ -51,6 +59,63 @@ static enum hrtimer_restart timerfd_tmrproc(struct hrtimer *htmr)
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return HRTIMER_NORESTART;
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}
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/*
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* Called when the clock was set to cancel the timers in the cancel
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* list.
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*/
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void timerfd_clock_was_set(void)
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{
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ktime_t moffs = ktime_get_monotonic_offset();
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struct timerfd_ctx *ctx;
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unsigned long flags;
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rcu_read_lock();
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list_for_each_entry_rcu(ctx, &cancel_list, clist) {
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if (!ctx->might_cancel)
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continue;
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spin_lock_irqsave(&ctx->wqh.lock, flags);
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if (ctx->moffs.tv64 != moffs.tv64) {
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ctx->moffs.tv64 = KTIME_MAX;
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wake_up_locked(&ctx->wqh);
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}
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spin_unlock_irqrestore(&ctx->wqh.lock, flags);
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}
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rcu_read_unlock();
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}
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static void timerfd_remove_cancel(struct timerfd_ctx *ctx)
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{
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if (ctx->might_cancel) {
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ctx->might_cancel = false;
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spin_lock(&cancel_lock);
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list_del_rcu(&ctx->clist);
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spin_unlock(&cancel_lock);
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}
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}
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static bool timerfd_canceled(struct timerfd_ctx *ctx)
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{
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if (!ctx->might_cancel || ctx->moffs.tv64 != KTIME_MAX)
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return false;
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ctx->moffs = ktime_get_monotonic_offset();
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return true;
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}
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static void timerfd_setup_cancel(struct timerfd_ctx *ctx, int flags)
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{
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if (ctx->clockid == CLOCK_REALTIME && (flags & TFD_TIMER_ABSTIME) &&
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(flags & TFD_TIMER_CANCEL_ON_SET)) {
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if (!ctx->might_cancel) {
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ctx->might_cancel = true;
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spin_lock(&cancel_lock);
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list_add_rcu(&ctx->clist, &cancel_list);
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spin_unlock(&cancel_lock);
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}
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} else if (ctx->might_cancel) {
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timerfd_remove_cancel(ctx);
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}
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}
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static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx)
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{
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ktime_t remaining;
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@ -59,11 +124,12 @@ static ktime_t timerfd_get_remaining(struct timerfd_ctx *ctx)
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return remaining.tv64 < 0 ? ktime_set(0, 0): remaining;
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}
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static void timerfd_setup(struct timerfd_ctx *ctx, int flags,
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const struct itimerspec *ktmr)
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static int timerfd_setup(struct timerfd_ctx *ctx, int flags,
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const struct itimerspec *ktmr)
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{
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enum hrtimer_mode htmode;
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ktime_t texp;
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int clockid = ctx->clockid;
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htmode = (flags & TFD_TIMER_ABSTIME) ?
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HRTIMER_MODE_ABS: HRTIMER_MODE_REL;
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@ -72,19 +138,24 @@ static void timerfd_setup(struct timerfd_ctx *ctx, int flags,
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ctx->expired = 0;
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ctx->ticks = 0;
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ctx->tintv = timespec_to_ktime(ktmr->it_interval);
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hrtimer_init(&ctx->tmr, ctx->clockid, htmode);
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hrtimer_init(&ctx->tmr, clockid, htmode);
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hrtimer_set_expires(&ctx->tmr, texp);
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ctx->tmr.function = timerfd_tmrproc;
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if (texp.tv64 != 0)
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if (texp.tv64 != 0) {
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hrtimer_start(&ctx->tmr, texp, htmode);
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if (timerfd_canceled(ctx))
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return -ECANCELED;
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}
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return 0;
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}
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static int timerfd_release(struct inode *inode, struct file *file)
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{
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struct timerfd_ctx *ctx = file->private_data;
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timerfd_remove_cancel(ctx);
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hrtimer_cancel(&ctx->tmr);
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kfree(ctx);
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kfree_rcu(ctx, rcu);
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return 0;
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}
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@ -118,8 +189,21 @@ static ssize_t timerfd_read(struct file *file, char __user *buf, size_t count,
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res = -EAGAIN;
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else
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res = wait_event_interruptible_locked_irq(ctx->wqh, ctx->ticks);
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/*
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* If clock has changed, we do not care about the
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* ticks and we do not rearm the timer. Userspace must
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* reevaluate anyway.
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*/
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if (timerfd_canceled(ctx)) {
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ctx->ticks = 0;
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ctx->expired = 0;
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res = -ECANCELED;
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}
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if (ctx->ticks) {
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ticks = ctx->ticks;
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if (ctx->expired && ctx->tintv.tv64) {
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/*
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* If tintv.tv64 != 0, this is a periodic timer that
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@ -183,6 +267,7 @@ SYSCALL_DEFINE2(timerfd_create, int, clockid, int, flags)
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init_waitqueue_head(&ctx->wqh);
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ctx->clockid = clockid;
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hrtimer_init(&ctx->tmr, clockid, HRTIMER_MODE_ABS);
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ctx->moffs = ktime_get_monotonic_offset();
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ufd = anon_inode_getfd("[timerfd]", &timerfd_fops, ctx,
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O_RDWR | (flags & TFD_SHARED_FCNTL_FLAGS));
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@ -199,6 +284,7 @@ SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
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struct file *file;
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struct timerfd_ctx *ctx;
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struct itimerspec ktmr, kotmr;
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int ret;
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if (copy_from_user(&ktmr, utmr, sizeof(ktmr)))
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return -EFAULT;
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@ -213,6 +299,8 @@ SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
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return PTR_ERR(file);
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ctx = file->private_data;
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timerfd_setup_cancel(ctx, flags);
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/*
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* We need to stop the existing timer before reprogramming
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* it to the new values.
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@ -240,14 +328,14 @@ SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
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/*
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* Re-program the timer to the new value ...
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*/
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timerfd_setup(ctx, flags, &ktmr);
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ret = timerfd_setup(ctx, flags, &ktmr);
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spin_unlock_irq(&ctx->wqh.lock);
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fput(file);
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if (otmr && copy_to_user(otmr, &kotmr, sizeof(kotmr)))
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return -EFAULT;
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return 0;
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return ret;
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}
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SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct itimerspec __user *, otmr)
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@ -143,19 +143,18 @@ struct hrtimer_sleeper {
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*/
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struct hrtimer_clock_base {
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struct hrtimer_cpu_base *cpu_base;
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clockid_t index;
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int index;
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clockid_t clockid;
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struct timerqueue_head active;
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ktime_t resolution;
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ktime_t (*get_time)(void);
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ktime_t softirq_time;
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#ifdef CONFIG_HIGH_RES_TIMERS
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ktime_t offset;
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#endif
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};
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enum hrtimer_base_type {
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HRTIMER_BASE_REALTIME,
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HRTIMER_BASE_MONOTONIC,
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HRTIMER_BASE_REALTIME,
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HRTIMER_BASE_BOOTTIME,
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HRTIMER_MAX_CLOCK_BASES,
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};
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@ -164,7 +163,7 @@ enum hrtimer_base_type {
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* struct hrtimer_cpu_base - the per cpu clock bases
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* @lock: lock protecting the base and associated clock bases
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* and timers
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* @clock_base: array of clock bases for this cpu
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* @active_bases: Bitfield to mark bases with active timers
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* @expires_next: absolute time of the next event which was scheduled
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* via clock_set_next_event()
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* @hres_active: State of high resolution mode
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@ -173,10 +172,11 @@ enum hrtimer_base_type {
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* @nr_retries: Total number of hrtimer interrupt retries
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* @nr_hangs: Total number of hrtimer interrupt hangs
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* @max_hang_time: Maximum time spent in hrtimer_interrupt
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* @clock_base: array of clock bases for this cpu
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*/
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struct hrtimer_cpu_base {
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raw_spinlock_t lock;
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struct hrtimer_clock_base clock_base[HRTIMER_MAX_CLOCK_BASES];
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unsigned long active_bases;
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#ifdef CONFIG_HIGH_RES_TIMERS
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ktime_t expires_next;
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int hres_active;
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@ -186,6 +186,7 @@ struct hrtimer_cpu_base {
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unsigned long nr_hangs;
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ktime_t max_hang_time;
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#endif
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struct hrtimer_clock_base clock_base[HRTIMER_MAX_CLOCK_BASES];
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};
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static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time)
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@ -256,8 +257,6 @@ static inline ktime_t hrtimer_expires_remaining(const struct hrtimer *timer)
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#ifdef CONFIG_HIGH_RES_TIMERS
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struct clock_event_device;
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extern void clock_was_set(void);
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extern void hres_timers_resume(void);
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extern void hrtimer_interrupt(struct clock_event_device *dev);
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/*
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@ -291,16 +290,8 @@ extern void hrtimer_peek_ahead_timers(void);
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# define MONOTONIC_RES_NSEC LOW_RES_NSEC
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# define KTIME_MONOTONIC_RES KTIME_LOW_RES
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/*
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* clock_was_set() is a NOP for non- high-resolution systems. The
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* time-sorted order guarantees that a timer does not expire early and
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* is expired in the next softirq when the clock was advanced.
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*/
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static inline void clock_was_set(void) { }
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static inline void hrtimer_peek_ahead_timers(void) { }
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static inline void hres_timers_resume(void) { }
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/*
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* In non high resolution mode the time reference is taken from
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* the base softirq time variable.
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@ -316,10 +307,18 @@ static inline int hrtimer_is_hres_active(struct hrtimer *timer)
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}
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#endif
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extern void clock_was_set(void);
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#ifdef CONFIG_TIMERFD
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extern void timerfd_clock_was_set(void);
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#else
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static inline void timerfd_clock_was_set(void) { }
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#endif
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extern void hrtimers_resume(void);
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extern ktime_t ktime_get(void);
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extern ktime_t ktime_get_real(void);
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extern ktime_t ktime_get_boottime(void);
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extern ktime_t ktime_get_monotonic_offset(void);
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DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
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@ -29,7 +29,7 @@ struct restart_block {
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} futex;
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/* For nanosleep */
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struct {
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clockid_t index;
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clockid_t clockid;
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struct timespec __user *rmtp;
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#ifdef CONFIG_COMPAT
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struct compat_timespec __user *compat_rmtp;
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@ -19,6 +19,7 @@
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* shared O_* flags.
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*/
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#define TFD_TIMER_ABSTIME (1 << 0)
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#define TFD_TIMER_CANCEL_ON_SET (1 << 1)
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#define TFD_CLOEXEC O_CLOEXEC
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#define TFD_NONBLOCK O_NONBLOCK
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@ -26,6 +27,6 @@
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/* Flags for timerfd_create. */
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#define TFD_CREATE_FLAGS TFD_SHARED_FCNTL_FLAGS
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/* Flags for timerfd_settime. */
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#define TFD_SETTIME_FLAGS TFD_TIMER_ABSTIME
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#define TFD_SETTIME_FLAGS (TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET)
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#endif /* _LINUX_TIMERFD_H */
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|
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166
kernel/hrtimer.c
166
kernel/hrtimer.c
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@ -64,17 +64,20 @@ DEFINE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases) =
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.clock_base =
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{
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{
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.index = CLOCK_REALTIME,
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.get_time = &ktime_get_real,
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.resolution = KTIME_LOW_RES,
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},
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{
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.index = CLOCK_MONOTONIC,
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.index = HRTIMER_BASE_MONOTONIC,
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.clockid = CLOCK_MONOTONIC,
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.get_time = &ktime_get,
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.resolution = KTIME_LOW_RES,
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},
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{
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.index = CLOCK_BOOTTIME,
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.index = HRTIMER_BASE_REALTIME,
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.clockid = CLOCK_REALTIME,
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.get_time = &ktime_get_real,
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.resolution = KTIME_LOW_RES,
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},
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{
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.index = HRTIMER_BASE_BOOTTIME,
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.clockid = CLOCK_BOOTTIME,
|
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.get_time = &ktime_get_boottime,
|
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.resolution = KTIME_LOW_RES,
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},
|
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|
|
@ -196,7 +199,7 @@ switch_hrtimer_base(struct hrtimer *timer, struct hrtimer_clock_base *base,
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struct hrtimer_cpu_base *new_cpu_base;
|
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int this_cpu = smp_processor_id();
|
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int cpu = hrtimer_get_target(this_cpu, pinned);
|
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int basenum = hrtimer_clockid_to_base(base->index);
|
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int basenum = base->index;
|
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|
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again:
|
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new_cpu_base = &per_cpu(hrtimer_bases, cpu);
|
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|
|
@ -621,66 +624,6 @@ static int hrtimer_reprogram(struct hrtimer *timer,
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return res;
|
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}
|
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|
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|
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/*
|
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* Retrigger next event is called after clock was set
|
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*
|
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* Called with interrupts disabled via on_each_cpu()
|
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*/
|
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static void retrigger_next_event(void *arg)
|
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{
|
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struct hrtimer_cpu_base *base;
|
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struct timespec realtime_offset, wtm, sleep;
|
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|
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if (!hrtimer_hres_active())
|
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return;
|
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|
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get_xtime_and_monotonic_and_sleep_offset(&realtime_offset, &wtm,
|
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&sleep);
|
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set_normalized_timespec(&realtime_offset, -wtm.tv_sec, -wtm.tv_nsec);
|
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|
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base = &__get_cpu_var(hrtimer_bases);
|
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|
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/* Adjust CLOCK_REALTIME offset */
|
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raw_spin_lock(&base->lock);
|
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base->clock_base[HRTIMER_BASE_REALTIME].offset =
|
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timespec_to_ktime(realtime_offset);
|
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base->clock_base[HRTIMER_BASE_BOOTTIME].offset =
|
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timespec_to_ktime(sleep);
|
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|
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hrtimer_force_reprogram(base, 0);
|
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raw_spin_unlock(&base->lock);
|
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}
|
||||
|
||||
/*
|
||||
* Clock realtime was set
|
||||
*
|
||||
* Change the offset of the realtime clock vs. the monotonic
|
||||
* clock.
|
||||
*
|
||||
* We might have to reprogram the high resolution timer interrupt. On
|
||||
* SMP we call the architecture specific code to retrigger _all_ high
|
||||
* resolution timer interrupts. On UP we just disable interrupts and
|
||||
* call the high resolution interrupt code.
|
||||
*/
|
||||
void clock_was_set(void)
|
||||
{
|
||||
/* Retrigger the CPU local events everywhere */
|
||||
on_each_cpu(retrigger_next_event, NULL, 1);
|
||||
}
|
||||
|
||||
/*
|
||||
* During resume we might have to reprogram the high resolution timer
|
||||
* interrupt (on the local CPU):
|
||||
*/
|
||||
void hres_timers_resume(void)
|
||||
{
|
||||
WARN_ONCE(!irqs_disabled(),
|
||||
KERN_INFO "hres_timers_resume() called with IRQs enabled!");
|
||||
|
||||
retrigger_next_event(NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize the high resolution related parts of cpu_base
|
||||
*/
|
||||
|
|
@ -714,12 +657,40 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
|
|||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Retrigger next event is called after clock was set
|
||||
*
|
||||
* Called with interrupts disabled via on_each_cpu()
|
||||
*/
|
||||
static void retrigger_next_event(void *arg)
|
||||
{
|
||||
struct hrtimer_cpu_base *base = &__get_cpu_var(hrtimer_bases);
|
||||
struct timespec realtime_offset, xtim, wtm, sleep;
|
||||
|
||||
if (!hrtimer_hres_active())
|
||||
return;
|
||||
|
||||
/* Optimized out for !HIGH_RES */
|
||||
get_xtime_and_monotonic_and_sleep_offset(&xtim, &wtm, &sleep);
|
||||
set_normalized_timespec(&realtime_offset, -wtm.tv_sec, -wtm.tv_nsec);
|
||||
|
||||
/* Adjust CLOCK_REALTIME offset */
|
||||
raw_spin_lock(&base->lock);
|
||||
base->clock_base[HRTIMER_BASE_REALTIME].offset =
|
||||
timespec_to_ktime(realtime_offset);
|
||||
base->clock_base[HRTIMER_BASE_BOOTTIME].offset =
|
||||
timespec_to_ktime(sleep);
|
||||
|
||||
hrtimer_force_reprogram(base, 0);
|
||||
raw_spin_unlock(&base->lock);
|
||||
}
|
||||
|
||||
/*
|
||||
* Switch to high resolution mode
|
||||
*/
|
||||
static int hrtimer_switch_to_hres(void)
|
||||
{
|
||||
int cpu = smp_processor_id();
|
||||
int i, cpu = smp_processor_id();
|
||||
struct hrtimer_cpu_base *base = &per_cpu(hrtimer_bases, cpu);
|
||||
unsigned long flags;
|
||||
|
||||
|
|
@ -735,9 +706,8 @@ static int hrtimer_switch_to_hres(void)
|
|||
return 0;
|
||||
}
|
||||
base->hres_active = 1;
|
||||
base->clock_base[HRTIMER_BASE_REALTIME].resolution = KTIME_HIGH_RES;
|
||||
base->clock_base[HRTIMER_BASE_MONOTONIC].resolution = KTIME_HIGH_RES;
|
||||
base->clock_base[HRTIMER_BASE_BOOTTIME].resolution = KTIME_HIGH_RES;
|
||||
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++)
|
||||
base->clock_base[i].resolution = KTIME_HIGH_RES;
|
||||
|
||||
tick_setup_sched_timer();
|
||||
|
||||
|
|
@ -761,9 +731,43 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
|
|||
return 0;
|
||||
}
|
||||
static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base) { }
|
||||
static inline void retrigger_next_event(void *arg) { }
|
||||
|
||||
#endif /* CONFIG_HIGH_RES_TIMERS */
|
||||
|
||||
/*
|
||||
* Clock realtime was set
|
||||
*
|
||||
* Change the offset of the realtime clock vs. the monotonic
|
||||
* clock.
|
||||
*
|
||||
* We might have to reprogram the high resolution timer interrupt. On
|
||||
* SMP we call the architecture specific code to retrigger _all_ high
|
||||
* resolution timer interrupts. On UP we just disable interrupts and
|
||||
* call the high resolution interrupt code.
|
||||
*/
|
||||
void clock_was_set(void)
|
||||
{
|
||||
#ifdef CONFIG_HIGHRES_TIMERS
|
||||
/* Retrigger the CPU local events everywhere */
|
||||
on_each_cpu(retrigger_next_event, NULL, 1);
|
||||
#endif
|
||||
timerfd_clock_was_set();
|
||||
}
|
||||
|
||||
/*
|
||||
* During resume we might have to reprogram the high resolution timer
|
||||
* interrupt (on the local CPU):
|
||||
*/
|
||||
void hrtimers_resume(void)
|
||||
{
|
||||
WARN_ONCE(!irqs_disabled(),
|
||||
KERN_INFO "hrtimers_resume() called with IRQs enabled!");
|
||||
|
||||
retrigger_next_event(NULL);
|
||||
timerfd_clock_was_set();
|
||||
}
|
||||
|
||||
static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer)
|
||||
{
|
||||
#ifdef CONFIG_TIMER_STATS
|
||||
|
|
@ -856,6 +860,7 @@ static int enqueue_hrtimer(struct hrtimer *timer,
|
|||
debug_activate(timer);
|
||||
|
||||
timerqueue_add(&base->active, &timer->node);
|
||||
base->cpu_base->active_bases |= 1 << base->index;
|
||||
|
||||
/*
|
||||
* HRTIMER_STATE_ENQUEUED is or'ed to the current state to preserve the
|
||||
|
|
@ -897,6 +902,8 @@ static void __remove_hrtimer(struct hrtimer *timer,
|
|||
#endif
|
||||
}
|
||||
timerqueue_del(&base->active, &timer->node);
|
||||
if (!timerqueue_getnext(&base->active))
|
||||
base->cpu_base->active_bases &= ~(1 << base->index);
|
||||
out:
|
||||
timer->state = newstate;
|
||||
}
|
||||
|
|
@ -1234,7 +1241,6 @@ static void __run_hrtimer(struct hrtimer *timer, ktime_t *now)
|
|||
void hrtimer_interrupt(struct clock_event_device *dev)
|
||||
{
|
||||
struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
|
||||
struct hrtimer_clock_base *base;
|
||||
ktime_t expires_next, now, entry_time, delta;
|
||||
int i, retries = 0;
|
||||
|
||||
|
|
@ -1256,12 +1262,15 @@ retry:
|
|||
*/
|
||||
cpu_base->expires_next.tv64 = KTIME_MAX;
|
||||
|
||||
base = cpu_base->clock_base;
|
||||
|
||||
for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
|
||||
ktime_t basenow;
|
||||
struct hrtimer_clock_base *base;
|
||||
struct timerqueue_node *node;
|
||||
ktime_t basenow;
|
||||
|
||||
if (!(cpu_base->active_bases & (1 << i)))
|
||||
continue;
|
||||
|
||||
base = cpu_base->clock_base + i;
|
||||
basenow = ktime_add(now, base->offset);
|
||||
|
||||
while ((node = timerqueue_getnext(&base->active))) {
|
||||
|
|
@ -1294,7 +1303,6 @@ retry:
|
|||
|
||||
__run_hrtimer(timer, &basenow);
|
||||
}
|
||||
base++;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -1525,7 +1533,7 @@ long __sched hrtimer_nanosleep_restart(struct restart_block *restart)
|
|||
struct timespec __user *rmtp;
|
||||
int ret = 0;
|
||||
|
||||
hrtimer_init_on_stack(&t.timer, restart->nanosleep.index,
|
||||
hrtimer_init_on_stack(&t.timer, restart->nanosleep.clockid,
|
||||
HRTIMER_MODE_ABS);
|
||||
hrtimer_set_expires_tv64(&t.timer, restart->nanosleep.expires);
|
||||
|
||||
|
|
@ -1577,7 +1585,7 @@ long hrtimer_nanosleep(struct timespec *rqtp, struct timespec __user *rmtp,
|
|||
|
||||
restart = ¤t_thread_info()->restart_block;
|
||||
restart->fn = hrtimer_nanosleep_restart;
|
||||
restart->nanosleep.index = t.timer.base->index;
|
||||
restart->nanosleep.clockid = t.timer.base->clockid;
|
||||
restart->nanosleep.rmtp = rmtp;
|
||||
restart->nanosleep.expires = hrtimer_get_expires_tv64(&t.timer);
|
||||
|
||||
|
|
|
|||
|
|
@ -1514,7 +1514,7 @@ static int posix_cpu_nsleep(const clockid_t which_clock, int flags,
|
|||
return -EFAULT;
|
||||
|
||||
restart_block->fn = posix_cpu_nsleep_restart;
|
||||
restart_block->nanosleep.index = which_clock;
|
||||
restart_block->nanosleep.clockid = which_clock;
|
||||
restart_block->nanosleep.rmtp = rmtp;
|
||||
restart_block->nanosleep.expires = timespec_to_ns(rqtp);
|
||||
}
|
||||
|
|
@ -1523,7 +1523,7 @@ static int posix_cpu_nsleep(const clockid_t which_clock, int flags,
|
|||
|
||||
static long posix_cpu_nsleep_restart(struct restart_block *restart_block)
|
||||
{
|
||||
clockid_t which_clock = restart_block->nanosleep.index;
|
||||
clockid_t which_clock = restart_block->nanosleep.clockid;
|
||||
struct timespec t;
|
||||
struct itimerspec it;
|
||||
int error;
|
||||
|
|
|
|||
|
|
@ -1056,7 +1056,7 @@ SYSCALL_DEFINE4(clock_nanosleep, const clockid_t, which_clock, int, flags,
|
|||
*/
|
||||
long clock_nanosleep_restart(struct restart_block *restart_block)
|
||||
{
|
||||
clockid_t which_clock = restart_block->nanosleep.index;
|
||||
clockid_t which_clock = restart_block->nanosleep.clockid;
|
||||
struct k_clock *kc = clockid_to_kclock(which_clock);
|
||||
|
||||
if (WARN_ON_ONCE(!kc || !kc->nsleep_restart))
|
||||
|
|
|
|||
|
|
@ -494,7 +494,7 @@ static int update_rmtp(ktime_t exp, enum alarmtimer_type type,
|
|||
*/
|
||||
static long __sched alarm_timer_nsleep_restart(struct restart_block *restart)
|
||||
{
|
||||
enum alarmtimer_type type = restart->nanosleep.index;
|
||||
enum alarmtimer_type type = restart->nanosleep.clockid;
|
||||
ktime_t exp;
|
||||
struct timespec __user *rmtp;
|
||||
struct alarm alarm;
|
||||
|
|
@ -573,7 +573,7 @@ static int alarm_timer_nsleep(const clockid_t which_clock, int flags,
|
|||
|
||||
restart = ¤t_thread_info()->restart_block;
|
||||
restart->fn = alarm_timer_nsleep_restart;
|
||||
restart->nanosleep.index = type;
|
||||
restart->nanosleep.clockid = type;
|
||||
restart->nanosleep.expires = exp.tv64;
|
||||
restart->nanosleep.rmtp = rmtp;
|
||||
ret = -ERESTART_RESTARTBLOCK;
|
||||
|
|
@ -669,12 +669,20 @@ static int __init has_wakealarm(struct device *dev, void *name_ptr)
|
|||
*/
|
||||
static int __init alarmtimer_init_late(void)
|
||||
{
|
||||
struct device *dev;
|
||||
char *str;
|
||||
|
||||
/* Find an rtc device and init the rtc_timer */
|
||||
class_find_device(rtc_class, NULL, &str, has_wakealarm);
|
||||
if (str)
|
||||
dev = class_find_device(rtc_class, NULL, &str, has_wakealarm);
|
||||
/* If we have a device then str is valid. See has_wakealarm() */
|
||||
if (dev) {
|
||||
rtcdev = rtc_class_open(str);
|
||||
/*
|
||||
* Drop the reference we got in class_find_device,
|
||||
* rtc_open takes its own.
|
||||
*/
|
||||
put_device(dev);
|
||||
}
|
||||
if (!rtcdev) {
|
||||
printk(KERN_WARNING "No RTC device found, ALARM timers will"
|
||||
" not wake from suspend");
|
||||
|
|
|
|||
|
|
@ -456,23 +456,27 @@ void tick_broadcast_oneshot_control(unsigned long reason)
|
|||
unsigned long flags;
|
||||
int cpu;
|
||||
|
||||
raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
|
||||
|
||||
/*
|
||||
* Periodic mode does not care about the enter/exit of power
|
||||
* states
|
||||
*/
|
||||
if (tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC)
|
||||
goto out;
|
||||
return;
|
||||
|
||||
bc = tick_broadcast_device.evtdev;
|
||||
/*
|
||||
* We are called with preemtion disabled from the depth of the
|
||||
* idle code, so we can't be moved away.
|
||||
*/
|
||||
cpu = smp_processor_id();
|
||||
td = &per_cpu(tick_cpu_device, cpu);
|
||||
dev = td->evtdev;
|
||||
|
||||
if (!(dev->features & CLOCK_EVT_FEAT_C3STOP))
|
||||
goto out;
|
||||
return;
|
||||
|
||||
bc = tick_broadcast_device.evtdev;
|
||||
|
||||
raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
|
||||
if (reason == CLOCK_EVT_NOTIFY_BROADCAST_ENTER) {
|
||||
if (!cpumask_test_cpu(cpu, tick_get_broadcast_oneshot_mask())) {
|
||||
cpumask_set_cpu(cpu, tick_get_broadcast_oneshot_mask());
|
||||
|
|
@ -489,8 +493,6 @@ void tick_broadcast_oneshot_control(unsigned long reason)
|
|||
tick_program_event(dev->next_event, 1);
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -680,7 +680,7 @@ static void timekeeping_resume(void)
|
|||
clockevents_notify(CLOCK_EVT_NOTIFY_RESUME, NULL);
|
||||
|
||||
/* Resume hrtimers */
|
||||
hres_timers_resume();
|
||||
hrtimers_resume();
|
||||
}
|
||||
|
||||
static int timekeeping_suspend(void)
|
||||
|
|
@ -1098,6 +1098,21 @@ void get_xtime_and_monotonic_and_sleep_offset(struct timespec *xtim,
|
|||
} while (read_seqretry(&xtime_lock, seq));
|
||||
}
|
||||
|
||||
/**
|
||||
* ktime_get_monotonic_offset() - get wall_to_monotonic in ktime_t format
|
||||
*/
|
||||
ktime_t ktime_get_monotonic_offset(void)
|
||||
{
|
||||
unsigned long seq;
|
||||
struct timespec wtom;
|
||||
|
||||
do {
|
||||
seq = read_seqbegin(&xtime_lock);
|
||||
wtom = wall_to_monotonic;
|
||||
} while (read_seqretry(&xtime_lock, seq));
|
||||
return timespec_to_ktime(wtom);
|
||||
}
|
||||
|
||||
/**
|
||||
* xtime_update() - advances the timekeeping infrastructure
|
||||
* @ticks: number of ticks, that have elapsed since the last call.
|
||||
|
|
|
|||
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