tree 5a221bd167ae7f1b0575fd24fbc5e4cdae18a598
parent ac046f1d6121ccdda6db66bd88acd52418f489b2
author Theodore Ts'o <tytso@mit.edu> 1247492752 -0400
committer Theodore Ts'o <tytso@mit.edu> 1247492752 -0400

ext4: Fix ext4_mb_initialize_context() to initialize all fields

Pavel Roskin pointed out that kmemcheck indicated that
ext4_mb_store_history() was accessing uninitialized values of
ac->ac_tail and ac->ac_buddy leading to garbage in the mballoc
history.  Fix this by initializing the entire structure to all zeros
first.

Also, two fields were getting doubly initialized by the caller of
ext4_mb_initialize_context, so remove them for efficiency's sake.

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