From: Denis ChengRq <crquan@gmail.com>
Date: Mon, 1 Dec 2008 22:34:56 +0000 (-0800)
Subject: fs/block_dev.c: __read_mostly improvement and sb_is_blkdev_sb utilization
X-Git-Tag: v2.6.29-rc1~549^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2acf7b90821785fe812cc0aa05148e5a1f84204;p=pandora-kernel.git

fs/block_dev.c: __read_mostly improvement and sb_is_blkdev_sb utilization

- iget5_locked in bdget really needs blockdev_superblock, instead of
  bd_mnt, so bd_mnt could be just a local variable;

- blockdev_superblock really needs __read_mostly, while local var bd_mnt
  not;

- make use of sb_is_blkdev_sb in bd_forget, instead of direct reference
  to blockdev_superblock.

Signed-off-by: Denis ChengRq <crquan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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