From: Jens Axboe <axboe@fb.com>
Date: Tue, 24 Jun 2014 22:22:24 +0000 (-0600)
Subject: block: add support for limiting gaps in SG lists
X-Git-Tag: omap-for-v3.16/fixes-rc4~49^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=66cb45aa41315d1d9972cada354fbdf7870d7714;p=pandora-kernel.git

block: add support for limiting gaps in SG lists

Another restriction inherited for NVMe - those devices don't support
SG lists that have "gaps" in them. Gaps refers to cases where the
previous SG entry doesn't end on a page boundary. For NVMe, all SG
entries must start at offset 0 (except the first) and end on a page
boundary (except the last).

Signed-off-by: Jens Axboe <axboe@fb.com>
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