md/bitmap: use sector_div for sector_t divisions
neilb: modified to not corrupt ->resync_max_sectors.
sector_div usage fixed by Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 03e0752..ac79fef 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -571,9 +571,10 @@
re_read:
/* If cluster_slot is set, the cluster is setup */
if (bitmap->cluster_slot >= 0) {
- sector_t bm_blocks;
+ sector_t bm_blocks = bitmap->mddev->resync_max_sectors;
- bm_blocks = bitmap->mddev->resync_max_sectors / (bitmap->mddev->bitmap_info.chunksize >> 9);
+ sector_div(bm_blocks,
+ bitmap->mddev->bitmap_info.chunksize >> 9);
bm_blocks = bm_blocks << 3;
bm_blocks = DIV_ROUND_UP_SECTOR_T(bm_blocks, 4096);
bitmap->mddev->bitmap_info.offset += bitmap->cluster_slot * (bm_blocks << 3);