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Commit 1d1bf92d authored by David Sterba's avatar David Sterba
Browse files

btrfs: scrub: clean up division in scrub_find_csum 



Use proper helpers for 64bit division.

Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 7736b0a4

fs/btrfs/scrub.c

+3 −1
Original line number Original line Diff line number Diff line
@@ -2708,7 +2708,9 @@ static int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u8 *csum) 
	if (!sum)

	if (!sum)

		return 0;

		return 0;





	index = ((u32)(logical - sum->bytenr)) / sctx->fs_info->sectorsize;

	index = div_u64(logical - sum->bytenr, sctx->fs_info->sectorsize);

	ASSERT(index < UINT_MAX);



	num_sectors = sum->len / sctx->fs_info->sectorsize;

	num_sectors = sum->len / sctx->fs_info->sectorsize;

	memcpy(csum, sum->sums + index, sctx->csum_size);

	memcpy(csum, sum->sums + index, sctx->csum_size);

	if (index == num_sectors - 1) {

	if (index == num_sectors - 1) {