tree 0bbe650c809d96b25d746c400e316c3ad71b4097
parent 9ea7df534ed2a18157434a496a12cf073ca00c52
author Christoph Hellwig <hch@infradead.org> 1308940182 -0400
committer Al Viro <viro@zeniv.linux.org.uk> 1311209265 -0400

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>