tree 8208c0cd33f2565f0f193d0afab282a7d0778382
parent 20e5c81fcff89535dced2ed71cf24c6c648ff40e
author Chen, Kenneth W <kenneth.w.chen@intel.com> 1129232969 +0200
committer Jens Axboe <axboe@nelson.home.kernel.dk> 1130480143 +0200

Following the same idea, it occurs to me that we should only update
disk stat when "now" is different from disk->stamp.  Otherwise, we
are again needlessly adding zero to the stats.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Signed-off-by: Jens Axboe <axboe@suse.de>