Commit 41f0e291 authored Jan 07, 2020 by Davidlohr Bueso Committed by Ingo Molnar Feb 11, 2020

locking/percpu-rwsem: Add might_sleep() for writer locking



We are missing this annotation in percpu_down_write(). Correct
this.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Waiman Long <longman@redhat.com>
Link: https://lkml.kernel.org/r/20200108013305.7732-1-dave@stgolabs.net

parent ac8dec42

kernel/locking/percpu-rwsem.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -212,6 +212,7 @@ static bool readers_active_check(struct percpu_rw_semaphore *sem)

		void percpu_down_write(struct percpu_rw_semaphore *sem)
		{
		might_sleep();
		rwsem_acquire(&sem->dep_map, 0, 0, _RET_IP_);

		/* Notify readers to take the slow path. */

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