From 31c93a0c29bf96efd806ccf4ee81cacf04f255de Mon Sep 17 00:00:00 2001
From: Milan Broz <mbroz@redhat.com>
Date: Fri, 8 Dec 2006 02:41:11 -0800
Subject: [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
--- 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);
-- 
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