From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Thu, 10 Sep 2009 03:34:50 +0000 (-0400)
Subject: ext4: check for need init flag in ext4_mb_load_buddy
X-Git-Tag: v2.6.32-rc1~633^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f41c0750538667b87a19c93952e5d42fcc069bd7;p=pandora-kernel.git

ext4: check for need init flag in ext4_mb_load_buddy

We should check for need init flag with the group's alloc_sem held, to
make sure while we are loading the buddy cache and holding a reference
to it, a file system resize can't add new blocks to same group.

The patch also drops the need init flag check in
ext4_mb_regular_allocator() because doing the check without holding
alloc_sem is racy.

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