ext4: Widen type of ext4_sb_info.s_mb_maxs[]
authorYasunori Goto <y-goto@jp.fujitsu.com>
Wed, 17 Dec 2008 05:48:39 +0000 (00:48 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Wed, 17 Dec 2008 05:48:39 +0000 (00:48 -0500)
commitff7ef329b268b603ea4a2303241ef1c3829fd574
tree5f95f4828ef7e68c06996b18c405bc0526e2bb34
parent93c0d86371a5b2e68473752a6e54ff03185c473e
ext4: Widen type of ext4_sb_info.s_mb_maxs[]

I chased the cause of following ext4 oops report which is tested on
ia64 box.

http://bugzilla.kernel.org/show_bug.cgi?id=12018

The cause is the size of s_mb_maxs array that is defined as "unsigned
short" in ext4_sb_info structure.  If the file system's block size is
8k or greater, an unsigned short is not wide enough to contain the
value fs->blocksize << 3.

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Miao Xie <miaox@cn.fujitsu.com>
Cc: stable@kernel.org
fs/ext4/ext4_sb.h
fs/ext4/mballoc.c