From: Zheng Liu <wenqing.lz@taobao.com>
Date: Mon, 29 Jul 2013 16:51:42 +0000 (-0400)
Subject: ext4: add WARN_ON to check the length of allocated blocks
X-Git-Tag: v3.11-rc5~20^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=44fb851dfb2f8e3462617e19a7b3b9025db9d919;p=pandora-kernel.git

ext4: add WARN_ON to check the length of allocated blocks

In commit 921f266b: ext4: add self-testing infrastructure to do a
sanity check, some sanity checks were added in map_blocks to make sure
'retval == map->m_len'.

Enable these checks by default and report any assertion failures using
ext4_warning() and WARN_ON() since they can help us to figure out some
bugs that are otherwise hard to hit.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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