From: Mikulas Patocka <mpatocka@redhat.com>
Date: Wed, 24 Oct 2012 23:11:18 +0000 (+1100)
Subject: track_chunk is always called with interrupts enabled. Consequently, we
X-Git-Tag: next-20121025~48^2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=cee3685bb2d9a7ce21520f810d27030472f1077b;p=karo-tx-linux.git

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>
---

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index a143921feaf6..223e7ebf24f7 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;
 }