From: Ira Weiny <ira.weiny@xxxxxxxxx>
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@xxxxxxxxx>
---
fs/btrfs/check-integrity.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index 6ff44e53814c..726eb894be8b 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_dev(bio) + bio->bi_partno);
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 +2715,8 @@ 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);
+ 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 &
--
2.28.0.rc0.12.gb6a658bd00c9
