From 1bf85046e493c88be1c1bad9084428373089f618 Mon Sep 17 00:00:00 2001
From: Jeff Mahoney <jeffm@suse.de>
Date: Thu, 21 Jul 2011 16:56:09 +0000
Subject: [PATCH] btrfs: Make extent-io callbacks that never fail return void

The set/clear bit and the extent split/merge hooks only ever return 0.

 Changing them to return void simplifies the error handling cases later.

 This patch changes the hook prototypes, the single implementation of each,
 and the functions that call them to return void instead.

 Since all four of these hooks execute under a spinlock, they're necessarily
 simple.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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