From: Theodore Ts'o <tytso@mit.edu>
Date: Mon, 6 Aug 2012 03:28:16 +0000 (-0400)
Subject: ext4: avoid kmemcheck complaint from reading uninitialized memory
X-Git-Tag: v3.2.29~87
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=11306f0a62f8c12b0fa4a35d0b4dc5a91fa79612;p=pandora-kernel.git

ext4: avoid kmemcheck complaint from reading uninitialized memory

commit 7e731bc9a12339f344cddf82166b82633d99dd86 upstream.

Commit 03179fe923 introduced a kmemcheck complaint in
ext4_da_get_block_prep() because we save and restore
ei->i_da_metadata_calc_last_lblock even though it is left
uninitialized in the case where i_da_metadata_calc_len is zero.

This doesn't hurt anything, but silencing the kmemcheck complaint
makes it easier for people to find real bugs.

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=45631
(which is marked as a regression).

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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