linux-kernel - [36/80] bdi: Initialize noop_backing_dev

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Message-Id: <20100924162618.020512493@clark.site>
Date:	Fri, 24 Sep 2010 09:24:24 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Jan Kara <jack@...e.cz>, Jens Axboe <jaxboe@...ionio.com>
Subject: [36/80] bdi: Initialize noop_backing_dev_info properly

2.6.35-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Jan Kara <jack@...e.cz>

commit 976e48f8a5b02fc33f3e5cad87fb3fcea041a49c upstream.

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

Signed-off-by: Jan Kara <jack@...e.cz>
Signed-off-by: Jens Axboe <jaxboe@...ionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 mm/backing-dev.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -29,6 +29,7 @@ EXPORT_SYMBOL_GPL(default_backing_dev_in
 
 struct backing_dev_info noop_backing_dev_info = {
 	.name		= "noop",
+	.capabilities	= BDI_CAP_NO_ACCT_AND_WRITEBACK,
 };
 EXPORT_SYMBOL_GPL(noop_backing_dev_info);
 
@@ -254,6 +255,7 @@ 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;
 }


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