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-rw-r--r--kernel/posix-cpu-timers.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index bf2a6502860a..d5dbef5e89e6 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -1272,10 +1272,6 @@ static inline int fastpath_timer_check(struct task_struct *tsk)
{
struct signal_struct *sig;
- /* tsk == current, ensure it is safe to use ->signal/sighand */
- if (unlikely(tsk->exit_state))
- return 0;
-
if (!task_cputime_zero(&tsk->cputime_expires)) {
struct task_cputime task_sample = {
.utime = tsk->utime,
@@ -1308,6 +1304,7 @@ void run_posix_cpu_timers(struct task_struct *tsk)
{
LIST_HEAD(firing);
struct k_itimer *timer, *next;
+ unsigned long flags;
BUG_ON(!irqs_disabled());
@@ -1318,7 +1315,8 @@ void run_posix_cpu_timers(struct task_struct *tsk)
if (!fastpath_timer_check(tsk))
return;
- spin_lock(&tsk->sighand->siglock);
+ if (!lock_task_sighand(tsk, &flags))
+ return;
/*
* Here we take off tsk->signal->cpu_timers[N] and
* tsk->cpu_timers[N] all the timers that are firing, and
@@ -1340,7 +1338,7 @@ void run_posix_cpu_timers(struct task_struct *tsk)
* that gets the timer lock before we do will give it up and
* spin until we've taken care of that timer below.
*/
- spin_unlock(&tsk->sighand->siglock);
+ unlock_task_sighand(tsk, &flags);
/*
* Now that all the timers on our list have the firing flag,