[dm-devel] [PATCH 18 of 29] dm-snap-possible-code-optimization.patch
Jonathan Brassow
jbrassow at redhat.com
Tue Mar 17 14:05:11 UTC 2009
Minor code clean-up. The reason I broke this out into a separate
patch is so people can check if I'm not missing anything... I
don't see a reason to check 's->valid' separately anymore.
RFC-by: Jonathan Brassow <jbrassow at redhat.com>
Index: linux-2.6/drivers/md/dm-snap.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-snap.c
+++ linux-2.6/drivers/md/dm-snap.c
@@ -741,20 +741,14 @@ static void pending_complete(struct dm_s
struct bio *snapshot_bios = NULL;
int error = 0;
+ down_write(&s->lock);
if (!success) {
/* Read/write error - snapshot is unusable */
- down_write(&s->lock);
__invalidate_snapshot(s, -EIO);
error = 1;
goto out;
}
- down_write(&s->lock);
- if (!s->valid) {
- error = 1;
- goto out;
- }
-
/*
* Check for conflicting reads. This is extremely improbable,
* so msleep(1) is sufficient and there is no need for a wait queue.
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