From: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Date: Wed, 7 Jul 2010 08:19:54 +0000 (+0900)
Subject: nilfs2: add sanity check in nilfs_btree_add_dirty_buffer
X-Git-Tag: v2.6.36-rc1~500^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cfa913a5077f7619869b2b4d1bf23ccb4f8b3d7b;p=pandora-kernel.git

nilfs2: add sanity check in nilfs_btree_add_dirty_buffer

According to the report titled "problem with nilfs_cleanerd" from
Łukasz Wójcicki, nilfs_btree_lookup_dirty_buffers or
nilfs_btree_add_dirty_buffer got memory violation during garbage
collection.

This could happen if a level field of given btree node buffer is
incorrect, which is a crucial internal bug.

This inserts a sanity check to figure out the problem.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
---

Reading git-diff-tree failed