block: Wording tweaks to write zeroes limits
commit29cc6a6834add5cddbc391d07c1b3ace2ad9b8eb
authorEric Blake <eblake@redhat.com>
Thu, 23 Jun 2016 22:37:20 +0000 (23 16:37 -0600)
committerKevin Wolf <kwolf@redhat.com>
Tue, 5 Jul 2016 14:46:25 +0000 (5 16:46 +0200)
treebed8a78c9b19f3199fdc21938b4e723a7ab7c089
parent5def6b80e1eca696c1fc6099e7f4d36729686402
block: Wording tweaks to write zeroes limits

Improve the documentation of the write zeroes limits, to mention
additional constraints that drivers should observe.  Worth squashing
into commit cf081fca, if that hadn't been pushed already :)

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
include/block/block_int.h