From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Tue, 12 May 2009 20:22:37 +0000 (-0400)
Subject: vfs: Add BUG_ON for delayed and unwritten flags in submit_bh()
X-Git-Tag: v2.6.31-rc1~396^2~47
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8fb0e342481c4d80040670fec915f0b9c7c6499a;p=pandora-kernel.git

vfs: Add BUG_ON for delayed and unwritten flags in submit_bh()

The BH_Delay and BH_Unwritten flags should never leak out to
submit_bh().  So add some BUG_ON() checks to submit_bh so we can get a
stack trace and determine how and why this might have happened.

(Note that only XFS and ext4 use these buffer head flags, and XFS does
not use submit_bh().  So this patch should only modify behavior for
ext4.)

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: linux-fsdevel@vger.kernel.org
---

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