workqueue: remove spurious WARN_ON_ONCE(in_irq()) from try_to_grab_pending()

e0aecdd874 ("workqueue: use irqsafe timer for delayed_work") made
try_to_grab_pending() safe to use from irq context but forgot to
remove WARN_ON_ONCE(in_irq()).  Remove it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 4f5c61f8b0e7c548768a1eb85b0b3d7841720f3c..143fd8c751f4afdd353fcdc56813043a38fd8c2e 100644 (file)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1070,8 +1070,6 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork,
 {
        struct global_cwq *gcwq;
 
-       WARN_ON_ONCE(in_irq());
-
        local_irq_save(*flags);
 
        /* try to steal the timer if it exists */