FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2025-01-18 07:27:20 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

dm snapshot: optimize track_chunk

Browse Source 
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>
This commit is contained in:
Mikulas Patocka 2012-12-21 20:23:33 +00:00 committed by Alasdair G Kergon
parent 19cbbc60c6
commit 9aa0c0e60f
1 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/md/dm-snap.c
View File

@ -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;
}