From: Christoph Hellwig <hch@infradead.org>
Date: Fri, 24 Jun 2011 18:29:42 +0000 (-0400)
Subject: fs: simplify handling of zero sized reads in __blockdev_direct_IO
X-Git-Tag: v3.1-rc1~282^2~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9b5570d7fdedff32a2e78102bfb54cd1b12b289;p=pandora-kernel.git

fs: simplify handling of zero sized reads in __blockdev_direct_IO

Reject zero sized reads as soon as we know our I/O length, and don't
borther with locks or allocations that might have to be cleaned up
otherwise.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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