summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2019-05-07 08:53:35 +0200
committerJens Axboe <axboe@kernel.dk>2019-05-07 08:39:02 -0600
commitb8753433fc611e23e31300e1d099001a08955c88 (patch)
tree0a48a4b1c8662900ba31f7dd51e51482a7251831
parent662156641bc409a28fa313fca1a755105425d278 (diff)
block: fix mismerge in bvec_advance
When Jens merged my commit to only allow contiguous page structs in a bio_vec with Ming's 5.1 fix to ensue the bvec length didn't overflow we failed to keep the removal of the expensive nth_page calls. This commits adds them back as intended. Fixes: 5c61ee2cd586 ("Merge tag 'v5.1-rc6' into for-5.2/block") Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--include/linux/bvec.h8
1 files changed, 1 insertions, 7 deletions
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index 545a480528e0..a032f01e928c 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -133,11 +133,6 @@ static inline struct bio_vec *bvec_init_iter_all(struct bvec_iter_all *iter_all)
return &iter_all->bv;
}
-static inline struct page *bvec_nth_page(struct page *page, int idx)
-{
- return idx == 0 ? page : nth_page(page, idx);
-}
-
static inline void bvec_advance(const struct bio_vec *bvec,
struct bvec_iter_all *iter_all)
{
@@ -147,8 +142,7 @@ static inline void bvec_advance(const struct bio_vec *bvec,
bv->bv_page++;
bv->bv_offset = 0;
} else {
- bv->bv_page = bvec_nth_page(bvec->bv_page, bvec->bv_offset /
- PAGE_SIZE);
+ bv->bv_page = bvec->bv_page + (bvec->bv_offset >> PAGE_SHIFT);
bv->bv_offset = bvec->bv_offset & ~PAGE_MASK;
}
bv->bv_len = min_t(unsigned int, PAGE_SIZE - bv->bv_offset,