aboutsummaryrefslogtreecommitdiff
path: root/drivers/md/dm-snap.c
diff options
context:
space:
mode:
authorMikulas Patocka <mpatocka@redhat.com>2012-12-21 20:23:33 +0000
committerAlasdair G Kergon <agk@redhat.com>2012-12-21 20:23:33 +0000
commit9aa0c0e60ffc2594acaad23127dbea9f3b61821c (patch)
tree4464d72c53cc977dea9ddf071ed8d88ee6c312d9 /drivers/md/dm-snap.c
parent19cbbc60c680e2e404bf55458ad2c4ff60d16076 (diff)
downloadlinaro-lsk-9aa0c0e60ffc2594acaad23127dbea9f3b61821c.tar.gz
dm snapshot: optimize track_chunk
track_chunk is always called with interrupts enabled. Consequently, we do not need to save and restore interrupt state in "flags" variable. This patch changes spin_lock_irqsave to spin_lock_irq and spin_unlock_irqrestore to spin_unlock_irq. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-snap.c')
-rw-r--r--drivers/md/dm-snap.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index a143921feaf..223e7ebf24f 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -198,14 +198,13 @@ static struct dm_snap_tracked_chunk *track_chunk(struct dm_snapshot *s,
{
struct dm_snap_tracked_chunk *c = mempool_alloc(s->tracked_chunk_pool,
GFP_NOIO);
- unsigned long flags;
c->chunk = chunk;
- spin_lock_irqsave(&s->tracked_chunk_lock, flags);
+ spin_lock_irq(&s->tracked_chunk_lock);
hlist_add_head(&c->node,
&s->tracked_chunk_hash[DM_TRACKED_CHUNK_HASH(chunk)]);
- spin_unlock_irqrestore(&s->tracked_chunk_lock, flags);
+ spin_unlock_irq(&s->tracked_chunk_lock);
return c;
}