From: Kent Overstreet <kmo@daterainc.com>
Date: Fri, 23 Aug 2013 22:12:21 +0000 (-0700)
Subject: bcache: Fix a dumb CPU spinning bug in writeback
X-Git-Tag: next-20130912~34^2~6^2~52
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=174c1412939888ffedc4da02b375bc579af2a93c;p=karo-tx-linux.git

bcache: Fix a dumb CPU spinning bug in writeback

schedule_timeout() != schedule_timeout_uninterruptible()

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v3.10
---

diff --git a/drivers/md/bcache/writeback.c b/drivers/md/bcache/writeback.c
index 27ac51934822..ba3ee48320f2 100644
--- a/drivers/md/bcache/writeback.c
+++ b/drivers/md/bcache/writeback.c
@@ -397,8 +397,7 @@ static void read_dirty(struct closure *cl)
 		if (delay > 0 &&
 		    (KEY_START(&w->key) != dc->last_read ||
 		     jiffies_to_msecs(delay) > 50))
-			while (delay)
-				delay = schedule_timeout(delay);
+			delay = schedule_timeout_uninterruptible(delay);
 
 		dc->last_read	= KEY_OFFSET(&w->key);