diff options
| -rw-r--r-- | include/linux/freezer.h | 20 | ||||
| -rw-r--r-- | include/linux/sched.h | 1 | ||||
| -rw-r--r-- | kernel/freezer.c | 27 | ||||
| -rw-r--r-- | kernel/kthread.c | 2 |
4 files changed, 8 insertions, 42 deletions
diff --git a/include/linux/freezer.h b/include/linux/freezer.h index a28842e..a33550f 100644 --- a/include/linux/freezer.h +++ b/include/linux/freezer.h @@ -49,7 +49,7 @@ static inline bool try_to_freeze(void) } extern bool freeze_task(struct task_struct *p); -extern bool __set_freezable(bool with_signal); +extern bool set_freezable(void); #ifdef CONFIG_CGROUP_FREEZER extern bool cgroup_freezing(struct task_struct *task); @@ -105,23 +105,6 @@ static inline int freezer_should_skip(struct task_struct *p) } /* - * Tell the freezer that the current task should be frozen by it - */ -static inline bool set_freezable(void) -{ - return __set_freezable(false); -} - -/* - * Tell the freezer that the current task should be frozen by it and that it - * should send a fake signal to the task to freeze it. - */ -static inline bool set_freezable_with_signal(void) -{ - return __set_freezable(true); -} - -/* * Freezer-friendly wrappers around wait_event_interruptible(), * wait_event_killable() and wait_event_interruptible_timeout(), originally * defined in <linux/wait.h> @@ -176,7 +159,6 @@ static inline void freezer_do_not_count(void) {} static inline void freezer_count(void) {} static inline int freezer_should_skip(struct task_struct *p) { return 0; } static inline void set_freezable(void) {} -static inline void set_freezable_with_signal(void) {} #define wait_event_freezable(wq, condition) \ wait_event_interruptible(wq, condition) diff --git a/include/linux/sched.h b/include/linux/sched.h index d12bd03..2f90470 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1788,7 +1788,6 @@ extern void thread_group_times(struct task_struct *p, cputime_t *ut, cputime_t * #define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */ #define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */ #define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezable */ -#define PF_FREEZER_NOSIG 0x80000000 /* Freezer won't send signals to it */ /* * Only the _current_ task can read/write to tsk->flags, but other diff --git a/kernel/freezer.c b/kernel/freezer.c index 2589a61..9815b8d 100644 --- a/kernel/freezer.c +++ b/kernel/freezer.c @@ -39,7 +39,7 @@ bool freezing_slow_path(struct task_struct *p) if (pm_nosig_freezing || cgroup_freezing(p)) return true; - if (pm_freezing && !(p->flags & PF_FREEZER_NOSIG)) + if (pm_freezing && !(p->flags & PF_KTHREAD)) return true; return false; @@ -72,10 +72,6 @@ bool __refrigerator(bool check_kthr_stop) schedule(); } - spin_lock_irq(¤t->sighand->siglock); - recalc_sigpending(); /* We sent fake signal, clean it up */ - spin_unlock_irq(¤t->sighand->siglock); - pr_debug("%s left refrigerator\n", current->comm); /* @@ -120,7 +116,7 @@ bool freeze_task(struct task_struct *p) return false; } - if (!(p->flags & PF_FREEZER_NOSIG)) { + if (!(p->flags & PF_KTHREAD)) { fake_signal_wake_up(p); /* * fake_signal_wake_up() goes through p's scheduler @@ -145,28 +141,19 @@ void __thaw_task(struct task_struct *p) * be visible to @p as waking up implies wmb. Waking up inside * freezer_lock also prevents wakeups from leaking outside * refrigerator. - * - * If !FROZEN, @p hasn't reached refrigerator, recalc sigpending to - * avoid leaving dangling TIF_SIGPENDING behind. */ spin_lock_irqsave(&freezer_lock, flags); - if (frozen(p)) { + if (frozen(p)) wake_up_process(p); - } else { - spin_lock(&p->sighand->siglock); - recalc_sigpending_and_wake(p); - spin_unlock(&p->sighand->siglock); - } spin_unlock_irqrestore(&freezer_lock, flags); } /** - * __set_freezable - make %current freezable - * @with_signal: do we want %TIF_SIGPENDING for notification too? + * set_freezable - make %current freezable * * Mark %current freezable and enter refrigerator if necessary. */ -bool __set_freezable(bool with_signal) +bool set_freezable(void) { might_sleep(); @@ -177,10 +164,8 @@ bool __set_freezable(bool with_signal) */ spin_lock_irq(&freezer_lock); current->flags &= ~PF_NOFREEZE; - if (with_signal) - current->flags &= ~PF_FREEZER_NOSIG; spin_unlock_irq(&freezer_lock); return try_to_freeze(); } -EXPORT_SYMBOL(__set_freezable); +EXPORT_SYMBOL(set_freezable); diff --git a/kernel/kthread.c b/kernel/kthread.c index 1c36dea..3d3de633 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -282,7 +282,7 @@ int kthreadd(void *unused) set_cpus_allowed_ptr(tsk, cpu_all_mask); set_mems_allowed(node_states[N_HIGH_MEMORY]); - current->flags |= PF_NOFREEZE | PF_FREEZER_NOSIG; + current->flags |= PF_NOFREEZE; for (;;) { set_current_state(TASK_INTERRUPTIBLE); |
