Patch "dm raid: fix round up of default region size" has been added to the 4.2-stable tree

This is a note to let you know that I've just added the patch titled

dm raid: fix round up of default region size

to the 4.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
dm-raid-fix-round-up-of-default-region-size.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Mikulas Patocka <[email protected]>
Date: Fri, 2 Oct 2015 11:17:37 -0400
Subject: dm raid: fix round up of default region size

From: Mikulas Patocka <[email protected]>

commit 042745ee53a0a7c1f5aff191a4a24213c6dcfb52 upstream.

Commit 3a0f9aaee028 ("dm raid: round region_size to power of two") intended to make sure that the default region size is a power of two. However, the logic in that commit is incorrect and sets the variable region_size to 0 or 1, depending on whether min_region_size is a power of two.

Fix this logic, using roundup_pow_of_two(), so that region_size is properly rounded up to the next power of two.

---
 drivers/md/dm-raid.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

@@ -329,8 +329,7 @@ static int validate_region_size(struct r
 		 */
 		if (min_region_size > (1 << 13)) {
 			/* If not a power of 2, make it the next power of 2 */
-			if (min_region_size & (min_region_size - 1))
-				region_size = 1 << fls(region_size);
+			region_size = roundup_pow_of_two(min_region_size);
 			DMINFO("Choosing default region size of %lu sectors",
 			       region_size);
 		} else {

Patches currently in stable-queue which might be from [email protected] are

queue-4.2/dm-raid-fix-round-up-of-default-region-size.patch