From: Theodore Ts'o <tytso@mit.edu>
Date: Mon, 1 Sep 2014 18:39:09 +0000 (-0400)
Subject: ext4: allow a NULL argument to ext4_ext_drop_refs()
X-Git-Tag: fixes-against-v3.18-rc2~28^2~49
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b7ea89ad0a6b855172158a999d3f5008403f4011;p=pandora-kernel.git

ext4: allow a NULL argument to ext4_ext_drop_refs()

Teach ext4_ext_drop_refs() to accept a NULL argument, much like
kfree().  This allows us to drop a lot of checks to make sure path is
non-NULL before calling ext4_ext_drop_refs().

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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