From: Mike Snitzer <snitzer@redhat.com>
Date: Fri, 14 Sep 2018 01:16:20 +0000 (-0400)
Subject: dm thin metadata: fix __udivdi3 undefined on 32-bit
X-Git-Tag: v4.18.13~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aad46f77ece040dce2a082b1aabae72bd6899561;p=thirdparty%2Fkernel%2Fstable.git

dm thin metadata: fix __udivdi3 undefined on 32-bit

commit 013ad043906b2befd4a9bfb06219ed9fedd92716 upstream.

sector_div() is only viable for use with sector_t.
dm_block_t is typedef'd to uint64_t -- so use div_u64() instead.

Fixes: 3ab918281 ("dm thin metadata: try to avoid ever aborting transactions")
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 74f6770c70b12..20b0776e39ef3 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -832,10 +832,8 @@ static void __set_metadata_reserve(struct dm_pool_metadata *pmd)
 	if (r) {
 		DMERR("could not get size of metadata device");
 		pmd->metadata_reserve = max_blocks;
-	} else {
-		sector_div(total, 10);
-		pmd->metadata_reserve = min(max_blocks, total);
-	}
+	} else
+		pmd->metadata_reserve = min(max_blocks, div_u64(total, 10));
 }
 
 struct dm_pool_metadata *dm_pool_metadata_open(struct block_device *bdev,