dm: add missing memory barrier to dm_suspend · 7e5c1e830b - Gogs

dm: add missing memory barrier to dm_suspend

Add memory barrier to fix atomic_read of pending value.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

Milan Broz 17 years ago

parent

df922075f2

commit

7e5c1e830b

1 changed files with 1 additions and 0 deletions

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							+ 1
							
							- 0
						
drivers/md/dm.c
							 
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				@@ -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;