tree b1fd2a481778c5432237125580b6fc2d2e5d9510
parent 6badd79bd002788aaec27b50a74ab69ef65ab8ee
author Denis ChengRq <crquan@gmail.com> 1228170896 -0800
committer Al Viro <viro@zeniv.linux.org.uk> 1230764863 -0500

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>