[PATCH v3 07/14] md: raid1: use bio helper in process_checks()

Ming Lei
2017-03-16T16:14:36Z

Avoid to direct access to bvec table.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
drivers/md/raid1.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index b1345aa4efd8..4034a2963da8 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2130,6 +2130,7 @@ static void process_checks(struct r1bio *r1_bio)
int j;
int size;
int error;
+ struct bio_vec *bi;
struct bio *b = r1_bio->bios[i];
struct resync_pages *rp = get_resync_pages(b);
if (b->bi_end_io != end_sync_read)
@@ -2148,9 +2149,7 @@ static void process_checks(struct r1bio *r1_bio)
b->bi_private = rp;

size = b->bi_iter.bi_size;
- for (j = 0; j < vcnt ; j++) {
- struct bio_vec *bi;
- bi = &b->bi_io_vec[j];
+ bio_for_each_segment_all(bi, b, j) {
bi->bv_offset = 0;
if (size > PAGE_SIZE)
bi->bv_len = PAGE_SIZE;
@@ -2174,17 +2173,22 @@ static void process_checks(struct r1bio *r1_bio)
int error = sbio->bi_error;
struct page **ppages = get_resync_pages(pbio)->pages;
struct page **spages = get_resync_pages(sbio)->pages;
+ struct bio_vec *bi;
+ int page_len[RESYNC_PAGES];

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

+ bio_for_each_segment_all(bi, sbio, j)
+ page_len[j] = bi->bv_len;
+
if (!error) {
for (j = vcnt; j-- ; ) {
if (memcmp(page_address(ppages[j]),
page_address(spages[j]),
- sbio->bi_io_vec[j].bv_len))
+ page_len[j]))
break;
}
} else
--
2.9.3