From c2acf7b90821785fe812cc0aa05148e5a1f84204 Mon Sep 17 00:00:00 2001
From: Denis ChengRq <crquan@gmail.com>
Date: Mon, 1 Dec 2008 14:34:56 -0800
Subject: [PATCH] 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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