Commit 7e5c1e83 authored by Milan Broz's avatar Milan Broz Committed by Alasdair G Kergon
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dm: add missing memory barrier to dm_suspend 



Add memory barrier to fix atomic_read of pending value.

Signed-off-by: default avatarMilan Broz <mbroz@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent df922075

drivers/md/dm.c

+1 −0
Original line number Diff line number Diff line
@@ -1410,6 +1410,7 @@ int dm_suspend(struct mapped_device *md, unsigned suspend_flags) 
	while (1) {

		set_current_state(TASK_INTERRUPTIBLE);



		smp_mb();

		if (!atomic_read(&md->pending) || signal_pending(current))

			break;