dm crypt: use bio_add_page()
Use bio_add_page(), the standard interface for adding a page to a bio,
rather than open-coding the same.
It should be noted that the 'clone' bio that is allocated using
bio_alloc_bioset(), in crypt_alloc_buffer(), does _not_ set the
bio's BIO_CLONED flag. As such, bio_add_page()'s early return for true
bio clones (those with BIO_CLONED set) isn't applicable.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index a276883..4999c74 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -994,7 +994,6 @@
gfp_t gfp_mask = GFP_NOWAIT | __GFP_HIGHMEM;
unsigned i, len, remaining_size;
struct page *page;
- struct bio_vec *bvec;
retry:
if (unlikely(gfp_mask & __GFP_DIRECT_RECLAIM))
@@ -1019,12 +1018,7 @@
len = (remaining_size > PAGE_SIZE) ? PAGE_SIZE : remaining_size;
- bvec = &clone->bi_io_vec[clone->bi_vcnt++];
- bvec->bv_page = page;
- bvec->bv_len = len;
- bvec->bv_offset = 0;
-
- clone->bi_iter.bi_size += len;
+ bio_add_page(clone, page, len, 0);
remaining_size -= len;
}