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Commit 7736b0a4 authored by David Sterba's avatar David Sterba
Browse files

btrfs: scrub: clean up division in __scrub_mark_bitmap 



Use proper helpers for 64bit division and then cast to narrower type.

Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 2073c4c2

fs/btrfs/scrub.c

+6 −2
Original line number Diff line number Diff line
@@ -2620,7 +2620,8 @@ static inline void __scrub_mark_bitmap(struct scrub_parity *sparity, 
				       u64 start, u64 len)

{

	u64 offset;

	int nsectors;

	u64 nsectors64;

	u32 nsectors;

	int sectorsize = sparity->sctx->fs_info->sectorsize;



	if (len >= sparity->stripe_len) {
@@ -2631,7 +2632,10 @@ static inline void __scrub_mark_bitmap(struct scrub_parity *sparity, 
	start -= sparity->logic_start;

	start = div64_u64_rem(start, sparity->stripe_len, &offset);

	offset = div_u64(offset, sectorsize);

	nsectors = (int)len / sectorsize;

	nsectors64 = div_u64(len, sectorsize);



	ASSERT(nsectors64 < UINT_MAX);

	nsectors = (u32)nsectors64;



	if (offset + nsectors <= sparity->nsectors) {

		bitmap_set(bitmap, offset, nsectors);