[PATCH 02/10] block: conver to bio_first_bvec() & bio_first_page()

Ming Lei
2017-12-08T13:14:52Z

This patch converts to bio_first_bvec() & bio_first_page() for retrieve
the 1st bvec/page, and prepares for supporting multipage bvec.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
drivers/block/drbd/drbd_bitmap.c | 2 +-
drivers/block/zram/zram_drv.c | 2 +-
drivers/md/bcache/super.c | 8 ++++----
fs/btrfs/compression.c | 2 +-
fs/btrfs/inode.c | 4 ++--
fs/f2fs/data.c | 2 +-
kernel/power/swap.c | 2 +-
mm/page_io.c | 4 ++--
8 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index bd97908c766f..0fe155123c8c 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -953,7 +953,7 @@ static void drbd_bm_endio(struct bio *bio)
struct drbd_bm_aio_ctx *ctx = bio->bi_private;
struct drbd_device *device = ctx->device;
struct drbd_bitmap *b = device->bitmap;
- unsigned int idx = bm_page_to_idx(bio->bi_io_vec[0].bv_page);
+ unsigned int idx = bm_page_to_idx(bio_first_page(bio));

if ((ctx->flags & BM_AIO_COPY_PAGES) == 0 &&
!bm_test_page_unchanged(b->bm_pages[idx]))
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index d70eba30003a..36885b037ad3 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -430,7 +430,7 @@ static void put_entry_bdev(struct zram *zram, unsigned long entry)

static void zram_page_end_io(struct bio *bio)
{
- struct page *page = bio->bi_io_vec[0].bv_page;
+ struct page *page = bio_first_page(bio);

page_endio(page, op_is_write(bio_op(bio)),
blk_status_to_errno(bio->bi_status));
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index b4d28928dec5..da1a953d9545 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -211,7 +211,7 @@ static void write_bdev_super_endio(struct bio *bio)

static void __write_super(struct cache_sb *sb, struct bio *bio)
{
- struct cache_sb *out = page_address(bio->bi_io_vec[0].bv_page);
+ struct cache_sb *out = page_address(bio_first_page(bio));
unsigned i;

bio->bi_iter.bi_sector = SB_SECTOR;
@@ -1166,7 +1166,7 @@ static void register_bdev(struct cache_sb *sb, struct page *sb_page,
dc->bdev->bd_holder = dc;

bio_init(&dc->sb_bio, dc->sb_bio.bi_inline_vecs, 1);
- dc->sb_bio.bi_io_vec[0].bv_page = sb_page;
+ bio_first_bvec(&dc->sb_bio)->bv_page = sb_page;
get_page(sb_page);

if (cached_dev_init(dc, sb->block_size << 9))
@@ -1810,7 +1810,7 @@ void bch_cache_release(struct kobject *kobj)
free_fifo(&ca->free[i]);

if (ca->sb_bio.bi_inline_vecs[0].bv_page)
- put_page(ca->sb_bio.bi_io_vec[0].bv_page);
+ put_page(bio_first_page(&ca->sb_bio));

if (!IS_ERR_OR_NULL(ca->bdev))
blkdev_put(ca->bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
@@ -1864,7 +1864,7 @@ static int register_cache(struct cache_sb *sb, struct page *sb_page,
ca->bdev->bd_holder = ca;

bio_init(&ca->sb_bio, ca->sb_bio.bi_inline_vecs, 1);
- ca->sb_bio.bi_io_vec[0].bv_page = sb_page;
+ bio_first_bvec(&ca->sb_bio)->bv_page = sb_page;
get_page(sb_page);

if (blk_queue_discard(bdev_get_queue(ca->bdev)))
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 5982c8a71f02..fc0386c18574 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -563,7 +563,7 @@ blk_status_t btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
/* we need the actual starting offset of this extent in the file */
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree,
- page_offset(bio->bi_io_vec->bv_page),
+ page_offset(bio_first_page(bio)),
PAGE_SIZE);
read_unlock(&em_tree->lock);
if (!em)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 993061f83067..d28b66019d54 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8072,7 +8072,7 @@ static void btrfs_retry_endio_nocsum(struct bio *bio)
ASSERT(bio->bi_vcnt == 1);
io_tree = &BTRFS_I(inode)->io_tree;
failure_tree = &BTRFS_I(inode)->io_failure_tree;
- ASSERT(bio->bi_io_vec->bv_len == btrfs_inode_sectorsize(inode));
+ ASSERT(bio_first_bvec(bio)->bv_len == btrfs_inode_sectorsize(inode));

done->uptodate = 1;
ASSERT(!bio_flagged(bio, BIO_CLONED));
@@ -8162,7 +8162,7 @@ static void btrfs_retry_endio(struct bio *bio)
uptodate = 1;

ASSERT(bio->bi_vcnt == 1);
- ASSERT(bio->bi_io_vec->bv_len == btrfs_inode_sectorsize(done->inode));
+ ASSERT(bio_first_bvec(bio)->bv_len == btrfs_inode_sectorsize(done->inode));

io_tree = &BTRFS_I(inode)->io_tree;
failure_tree = &BTRFS_I(inode)->io_failure_tree;
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 516fa0d3ff9c..9c2463f9272d 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -56,7 +56,7 @@ static void f2fs_read_end_io(struct bio *bio)
int i;

#ifdef CONFIG_F2FS_FAULT_INJECTION
- if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO)) {
+ if (time_to_inject(F2FS_P_SB(bio_first_page(bio)), FAULT_IO)) {
f2fs_show_injection_info(FAULT_IO);
bio->bi_status = BLK_STS_IOERR;
}
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 293ead59eccc..488e4a490dfa 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -240,7 +240,7 @@ static void hib_init_batch(struct hib_bio_batch *hb)
static void hib_end_io(struct bio *bio)
{
struct hib_bio_batch *hb = bio->bi_private;
- struct page *page = bio->bi_io_vec[0].bv_page;
+ struct page *page = bio_first_page(bio);

if (bio->bi_status) {
pr_alert("Read-error on swap-device (%u:%u:%Lu)\n",
diff --git a/mm/page_io.c b/mm/page_io.c
index e93f1a4cacd7..edcf5389eab7 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -50,7 +50,7 @@ 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;
+ struct page *page = bio_first_page(bio);

if (bio->bi_status) {
SetPageError(page);
@@ -122,7 +122,7 @@ 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;
+ struct page *page = bio_first_page(bio);
struct task_struct *waiter = bio->bi_private;

if (bio->bi_status) {
--
2.9.5