block: use i_size_write() in bd_set_size()
commitc1a782a5c7a83f4aa3239533619e93b1fc3ab79d
authorGuo Chao <yan@linux.vnet.ibm.com>
Thu, 21 Feb 2013 23:16:42 +0000 (21 15:16 -0800)
committerBen Hutchings <ben@decadent.org.uk>
Wed, 20 Mar 2013 15:03:40 +0000 (20 15:03 +0000)
tree65047209ea4e3e077db191fc807c9af49682c614
parent29db446a5e94c63403210afc28b7dc0a101562e3
block: use i_size_write() in bd_set_size()

commit d646a02a9d44d1421f273ae3923d97b47b918176 upstream.

blkdev_ioctl(GETBLKSIZE) uses i_size_read() to read size of block device.
If we update block size directly, reader may see intermediate result in
some machines and configurations.  Use i_size_write() instead.

Signed-off-by: Guo Chao <yan@linux.vnet.ibm.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Guo Chao <yan@linux.vnet.ibm.com>
Cc: M. Hindess <hindessm@uk.ibm.com>
Cc: Nikanth Karthikesan <knikanth@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
fs/block_dev.c