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| author | Ira Weiny <ira.weiny@intel.com> | 2021-02-16 18:48:25 -0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2021-04-19 17:25:16 +0200 |
| commit | 3e037efdbd72799d94afa6e0fcef5ff70359a895 (patch) | |
| tree | 0145722aa7eceacd52e0a419a4dfcf932c88ed14 /fs/btrfs/check-integrity.c | |
| parent | 94a0b58d2d3b92c72fbf1b97d9129e470c1d2175 (diff) | |
| download | linux-3e037efdbd72799d94afa6e0fcef5ff70359a895.tar.gz linux-3e037efdbd72799d94afa6e0fcef5ff70359a895.tar.bz2 linux-3e037efdbd72799d94afa6e0fcef5ff70359a895.zip | |
btrfs: integrity-checker: use kmap_local_page in __btrfsic_submit_bio
Again there is an array of pointers which must be unmapped in the correct
order.
Convert the kmap()'s to kmap_local_page() and adjust the unmapping
to work backwards through the unmapping loop.
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/check-integrity.c')
| -rw-r--r-- | fs/btrfs/check-integrity.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c index 113cb85c1fd4..6cc8296be030 100644 --- a/fs/btrfs/check-integrity.c +++ b/fs/btrfs/check-integrity.c @@ -2677,7 +2677,7 @@ static void __btrfsic_submit_bio(struct bio *bio) dev_state = btrfsic_dev_state_lookup(bio->bi_bdev->bd_dev); if (NULL != dev_state && (bio_op(bio) == REQ_OP_WRITE) && bio_has_data(bio)) { - unsigned int i = 0; + int i = 0; u64 dev_bytenr; u64 cur_bytenr; struct bio_vec bvec; @@ -2702,7 +2702,7 @@ static void __btrfsic_submit_bio(struct bio *bio) bio_for_each_segment(bvec, bio, iter) { BUG_ON(bvec.bv_len != PAGE_SIZE); - mapped_datav[i] = kmap(bvec.bv_page); + mapped_datav[i] = kmap_local_page(bvec.bv_page); i++; if (dev_state->state->print_mask & @@ -2715,8 +2715,9 @@ static void __btrfsic_submit_bio(struct bio *bio) mapped_datav, segs, bio, &bio_is_patched, bio->bi_opf); - bio_for_each_segment(bvec, bio, iter) - kunmap(bvec.bv_page); + /* Unmap in reverse order */ + for (--i; i >= 0; i--) + kunmap_local(mapped_datav[i]); kfree(mapped_datav); } else if (NULL != dev_state && (bio->bi_opf & REQ_PREFLUSH)) { if (dev_state->state->print_mask & |