linux-kernel - [PATCH 09/11] dm: snapshot: abstract memory release

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Message-ID: <20061122190448.GZ6993@agk.surrey.redhat.com>
Date:	Wed, 22 Nov 2006 19:04:48 +0000
From:	Alasdair G Kergon <agk@...hat.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-kernel@...r.kernel.org, dm-devel@...hat.com,
	Milan Broz <mbroz@...hat.com>
Subject: [PATCH 09/11] dm: snapshot: abstract memory release

From: Milan Broz <mbroz@...hat.com>

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

Signed-off-by: Milan Broz <mbroz@...hat.com>
Signed-off-by: Alasdair G Kergon <agk@...hat.com>
Cc: dm-devel@...hat.com

Index: linux-2.6.19-rc6/drivers/md/dm-snap.c
===================================================================
--- linux-2.6.19-rc6.orig/drivers/md/dm-snap.c	2006-11-22 17:26:58.000000000 +0000
+++ linux-2.6.19-rc6/drivers/md/dm-snap.c	2006-11-22 17:27:01.000000000 +0000
@@ -564,6 +564,17 @@ static int snapshot_ctr(struct dm_target
 	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_targe
 	/* 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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