From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Date: Wed, 20 Apr 2011 06:44:57 +0000 (+0000)
Subject: Btrfs: allocate extent state and check the result properly
X-Git-Tag: v3.0-rc1~38^2~5^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8233767a227ac5843f1023b88c7272a7b5058f5f;p=pandora-kernel.git

Btrfs: allocate extent state and check the result properly

It doesn't allocate extent_state and check the result properly:
- in set_extent_bit, it doesn't allocate extent_state if the path is not
  allowed wait

- in clear_extent_bit, it doesn't check the result after atomic-ly allocate,
  we trigger BUG_ON() if it's fail

- if allocate fail, we trigger BUG_ON instead of returning -ENOMEM since
  the return value of clear_extent_bit() is ignored by many callers

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

Reading git-diff-tree failed