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-rw-r--r--kernel/freezer.c25
1 files changed, 9 insertions, 16 deletions
diff --git a/kernel/freezer.c b/kernel/freezer.c
index b8b562124ba9..11e32d419dec 100644
--- a/kernel/freezer.c
+++ b/kernel/freezer.c
@@ -129,21 +129,6 @@ out_unlock:
return ret;
}
-void cancel_freezing(struct task_struct *p)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&freezer_lock, flags);
- if (freezing(p)) {
- pr_debug(" clean up: %s\n", p->comm);
- clear_freeze_flag(p);
- spin_lock(&p->sighand->siglock);
- recalc_sigpending_and_wake(p);
- spin_unlock(&p->sighand->siglock);
- }
- spin_unlock_irqrestore(&freezer_lock, flags);
-}
-
void __thaw_task(struct task_struct *p)
{
unsigned long flags;
@@ -153,10 +138,18 @@ 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);
clear_freeze_flag(p);
- 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);
}