Commit 83c3e5e1 authored by Yufen Yu's avatar Yufen Yu Committed by Song Liu
Browse files

md/raid5: use do_div() for 64 bit divisions in raid5_sync_request 



We get compilation error on 32-bit architectures (e.g. m68k), as:

  ERROR: modpost: "__udivdi3" [drivers/md/raid456.ko] undefined!

Since 'sync_blocks' is defined as u64, use do_div() to fix this error.

Fixes: c911c46c ("md/raid456: convert macro STRIPE_* to RAID5_STRIPE_*")
Signed-off-by: default avatarYufen Yu <yuyufen@huawei.com>
Signed-off-by: default avatarSong Liu <songliubraving@fb.com>
parent ef67744e

drivers/md/raid5.c

+1 −1
Original line number Diff line number Diff line
@@ -6104,7 +6104,7 @@ static inline sector_t raid5_sync_request(struct mddev *mddev, sector_t sector_n 
	    !md_bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&

	    sync_blocks >= RAID5_STRIPE_SECTORS(conf)) {

		/* we can skip this block, and probably more */

		sync_blocks /= RAID5_STRIPE_SECTORS(conf);

		do_div(sync_blocks, RAID5_STRIPE_SECTORS(conf));

		*skipped = 1;

		/* keep things rounded to whole stripes */

		return sync_blocks * RAID5_STRIPE_SECTORS(conf);