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Commit 3b0e6aac authored by Stephen Rothwell's avatar Stephen Rothwell Committed by NeilBrown
Browse files

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: default avatarStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent 935f3d4f

drivers/md/bitmap.c

+3 −2
Original line number Diff line number Diff line
@@ -571,9 +571,10 @@ static int bitmap_read_sb(struct bitmap *bitmap) 
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);