From: Tao Ma <boyu.mt@taobao.com>
Date: Tue, 25 Oct 2011 08:20:05 +0000 (+0200)
Subject: block: warn if tag is greater than real_max_depth.
X-Git-Tag: v3.2-rc1~49^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5e08159197b5b98a6648a172008de23f420e6c11;p=pandora-kernel.git

block: warn if tag is greater than real_max_depth.

In case tag depth is reduced, it is max_depth not real_max_depth.
So we should allow a request with tag >= max_depth, but for a
tag >= real_max_depth, there really should be some problem.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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