From 9d3d21aeb4f194cd7ac205abe68b14b47ae736a8 Mon Sep 17 00:00:00 2001
From: Ming Lei <tom.leiming@gmail.com>
Date: Sat, 10 May 2014 15:43:14 -0600
Subject: [PATCH] blk-mq: bitmap tag: select random tag betweet 0 and (depth -
 1)

The selected tag should be selected at random between 0 and
(depth - 1) with probability 1/depth, instead between 0 and
(depth - 2) with probability 1/(depth - 1).

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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Reading git-format-patch failed