From: Jens Axboe <jens.axboe@oracle.com>
Date: Fri, 1 Aug 2008 18:32:31 +0000 (+0200)
Subject: md: the bitmap code needs to use blk_plug_device_unlocked()
X-Git-Tag: v2.6.27-rc2~99^2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=93769f58078e2a066b56217cae1e343ac5a6b78c;p=linux-2.6

md: the bitmap code needs to use blk_plug_device_unlocked()

It doesn't hold the queue lock, so it's both racey on the queue flags
and thus spews a warning.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 621a272a2c..7e65bad522 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1234,7 +1234,7 @@ int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sect
 		case 0:
 			bitmap_file_set_bit(bitmap, offset);
 			bitmap_count_page(bitmap,offset, 1);
-			blk_plug_device(bitmap->mddev->queue);
+			blk_plug_device_unlocked(bitmap->mddev->queue);
 			/* fall through */
 		case 1:
 			*bmc = 2;