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Groups > linux.kernel > #1371498

[PATCH 27/27] mm: page_io.c: use bio_get_base_vec()

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Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
 mm/page_io.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/mm/page_io.c b/mm/page_io.c
index 18aac78..b5a6baf 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -43,7 +43,14 @@ static struct bio *get_swap_bio(gfp_t gfp_flags,
 
 void end_swap_bio_write(struct bio *bio)
 {
-	struct page *page = bio->bi_io_vec[0].bv_page;
+	/*
+	 * Single bvec bio.
+	 *
+	 * For accessing page pointed to by the 1st bvec, it
+	 * works too after multipage bvecs.
+	 */
+	struct bio_vec *bvec = bio_get_base_vec(bio);
+	struct page *page = bvec->bv_page;
 
 	if (bio->bi_error) {
 		SetPageError(page);
@@ -116,7 +123,14 @@ static void swap_slot_free_notify(struct page *page)
 
 static void end_swap_bio_read(struct bio *bio)
 {
-	struct page *page = bio->bi_io_vec[0].bv_page;
+	/*
+	 * Single bvec bio.
+	 *
+	 * For accessing page pointed to by the 1st bvec, it
+	 * works too after multipage bvecs.
+	 */
+	struct bio_vec *bvec = bio_get_base_vec(bio);
+	struct page *page = bvec->bv_page;
 
 	if (bio->bi_error) {
 		SetPageError(page);
-- 
1.9.1

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[PATCH 15/27] bcache: super: use bio_set_vec_table() Ming Lei <tom.leiming@gmail.com> - 2016-04-05 14:10 +0200
  [PATCH 18/27] dm: dm-io.c: use bio_get_base_vec() Ming Lei <tom.leiming@gmail.com> - 2016-04-05 14:10 +0200
  [PATCH 22/27] fs: logfs: convert to bio_add_page() in sync_request() Ming Lei <tom.leiming@gmail.com> - 2016-04-05 14:10 +0200
    Re: [PATCH 22/27] fs: logfs: convert to bio_add_page() in  sync_request() Christoph Hellwig <hch@infradead.org> - 2016-04-05 15:00 +0200
  [PATCH 19/27] dm: dm.c: replace 'bio->bi_vcnt == 1' with !bio_multiple_segments Ming Lei <tom.leiming@gmail.com> - 2016-04-05 14:10 +0200
  [PATCH 26/27] kernel/power/swap.c: use bio_get_base_vec() Ming Lei <tom.leiming@gmail.com> - 2016-04-05 14:20 +0200
    Re: [PATCH 26/27] kernel/power/swap.c: use bio_get_base_vec() Christoph Hellwig <hch@infradead.org> - 2016-04-05 15:00 +0200
      Re: [PATCH 26/27] kernel/power/swap.c: use bio_get_base_vec() Ming Lei <tom.leiming@gmail.com> - 2016-04-05 15:20 +0200
  [PATCH 25/27] fs: logfs: remove unnecesary check Ming Lei <tom.leiming@gmail.com> - 2016-04-05 14:20 +0200
  [PATCH 27/27] mm: page_io.c: use bio_get_base_vec() Ming Lei <tom.leiming@gmail.com> - 2016-04-05 14:20 +0200
  [PATCH 24/27] fs: logfs: use bio_add_page() in do_erase() Ming Lei <tom.leiming@gmail.com> - 2016-04-05 14:20 +0200

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