Trivial. Remove the unnecessary "work = NULL" initialization and turn read_barrier_depends() into smp_read_barrier_depends() in task_work_cancel().
Signed-off-by: Oleg Nesterov <[email protected]> --- kernel/task_work.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/task_work.c b/kernel/task_work.c index 65bd3c9..6ee0985 100644 --- a/kernel/task_work.c +++ b/kernel/task_work.c @@ -25,7 +25,7 @@ struct callback_head * task_work_cancel(struct task_struct *task, task_work_func_t func) { struct callback_head **pprev = &task->task_works; - struct callback_head *work = NULL; + struct callback_head *work; unsigned long flags; /* * If cmpxchg() fails we continue without updating pprev. @@ -35,7 +35,7 @@ task_work_cancel(struct task_struct *task, task_work_func_t func) */ raw_spin_lock_irqsave(&task->pi_lock, flags); while ((work = ACCESS_ONCE(*pprev))) { - read_barrier_depends(); + smp_read_barrier_depends(); if (work->func != func) pprev = &work->next; else if (cmpxchg(pprev, work, work->next) == work) -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
