[PATCH] dm: snapshot: abstract memory release

Move the code that releases memory used by a snapshot into a separate function.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: dm-devel@redhat.com
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index bbf861e..50e084d 100644 (file)
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -564,6 +564,17 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
        return r;
 }
 
+static void __free_exceptions(struct dm_snapshot *s)
+{
+       kcopyd_client_destroy(s->kcopyd_client);
+       s->kcopyd_client = NULL;
+
+       exit_exception_table(&s->pending, pending_cache);
+       exit_exception_table(&s->complete, exception_cache);
+
+       s->store.destroy(&s->store);
+}
+
 static void snapshot_dtr(struct dm_target *ti)
 {
        struct dm_snapshot *s = (struct dm_snapshot *) ti->private;
@@ -574,13 +585,7 @@ static void snapshot_dtr(struct dm_target *ti)
        /* After this returns there can be no new kcopyd jobs. */
        unregister_snapshot(s);
 
-       kcopyd_client_destroy(s->kcopyd_client);
-
-       exit_exception_table(&s->pending, pending_cache);
-       exit_exception_table(&s->complete, exception_cache);
-
-       /* Deallocate memory used */
-       s->store.destroy(&s->store);
+       __free_exceptions(s);
 
        dm_put_device(ti, s->origin);
        dm_put_device(ti, s->cow);