[PATCH V6 19/30] md/dm/bcache: conver to bio_for_each_chunk_segment_all and bio_for_each_chunk_all

Ming Lei
2018-06-09T12:34:25Z

In bch_bio_alloc_pages(), bio_for_each_chunk_all() is fine because this
helper can only be used on a freshly new bio.

For other cases, we conver to bio_for_each_chunk_segment_all() since they needn't
to update bvec table.

bio_for_each_segment_all() can't be used any more after multipage bvec is
enabled, so we have to convert to bio_for_each_chunk_segment_all().

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
drivers/md/bcache/btree.c | 3 ++-
drivers/md/bcache/util.c | 2 +-
drivers/md/dm-crypt.c | 3 ++-
drivers/md/raid1.c | 3 ++-
4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 2a0968c04e21..dc0747c37bdf 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -423,8 +423,9 @@ static void do_btree_node_write(struct btree *b)
int j;
struct bio_vec *bv;
void *base = (void *) ((unsigned long) i & ~(PAGE_SIZE - 1));
+ struct bvec_chunk_iter citer;

- bio_for_each_segment_all(bv, b->bio, j)
+ bio_for_each_chunk_segment_all(bv, b->bio, j, citer)
memcpy(page_address(bv->bv_page),
base + j * PAGE_SIZE, PAGE_SIZE);

diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c
index fc479b026d6d..2f05199f7edb 100644
--- a/drivers/md/bcache/util.c
+++ b/drivers/md/bcache/util.c
@@ -268,7 +268,7 @@ int bch_bio_alloc_pages(struct bio *bio, gfp_t gfp_mask)
int i;
struct bio_vec *bv;

- bio_for_each_segment_all(bv, bio, i) {
+ bio_for_each_chunk_all(bv, bio, i) {
bv->bv_page = alloc_page(gfp_mask);
if (!bv->bv_page) {
while (--bv >= bio->bi_io_vec)
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index da02f4d8e4b9..637ef1b1dc43 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1450,8 +1450,9 @@ static void crypt_free_buffer_pages(struct crypt_config *cc, struct bio *clone)
{
unsigned int i;
struct bio_vec *bv;
+ struct bvec_chunk_iter citer;

- bio_for_each_segment_all(bv, clone, i) {
+ bio_for_each_chunk_segment_all(bv, clone, i, citer) {
BUG_ON(!bv->bv_page);
mempool_free(bv->bv_page, &cc->page_pool);
}
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index bad28520719b..2a4f1037c680 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2116,13 +2116,14 @@ static void process_checks(struct r1bio *r1_bio)
struct page **spages = get_resync_pages(sbio)->pages;
struct bio_vec *bi;
int page_len[RESYNC_PAGES] = { 0 };
+ struct bvec_chunk_iter citer;

if (sbio->bi_end_io != end_sync_read)
continue;
/* Now we can 'fixup' the error value */
sbio->bi_status = 0;

- bio_for_each_segment_all(bi, sbio, j)
+ bio_for_each_chunk_segment_all(bi, sbio, j, citer)
page_len[j] = bi->bv_len;

if (!status) {
--
2.9.5