From: Jan Kara <jack@suse.cz>
Date: Tue, 21 Sep 2010 09:48:55 +0000 (+0200)
Subject: bdi: Initialize noop_backing_dev_info properly
X-Git-Tag: v2.6.36-rc6~79^2~2
X-Git-Url: http://bbs.cooldavid.org/git/?a=commitdiff_plain;h=976e48f8a5b02fc33f3e5cad87fb3fcea041a49c;p=net-next-2.6.git

bdi: Initialize noop_backing_dev_info properly

Properly initialize this backing dev info so that writeback code does not
barf when getting to it e.g. via sb->s_bdi.

Cc: stable@kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
---

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index c2bf86f470e..65d420499a6 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -30,6 +30,7 @@ EXPORT_SYMBOL_GPL(default_backing_dev_info);
 
 struct backing_dev_info noop_backing_dev_info = {
 	.name		= "noop",
+	.capabilities	= BDI_CAP_NO_ACCT_AND_WRITEBACK,
 };
 EXPORT_SYMBOL_GPL(noop_backing_dev_info);
 
@@ -243,6 +244,7 @@ static int __init default_bdi_init(void)
 	err = bdi_init(&default_backing_dev_info);
 	if (!err)
 		bdi_register(&default_backing_dev_info, NULL, "default");
+	err = bdi_init(&noop_backing_dev_info);
 
 	return err;
 }