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btrfs: get rid of sector_t and use u64 offset in submit_extent_page 

The use of sector_t in the callchain of submit_extent_page is not
necessary.  Switch to u64 and rename the variable and use byte units
instead of 512b, ie.  dropping the >> 9 shifts and avoiding the
con(tro)versions of sector_t.

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2017-10-04 17:30:11 +02:00
Родитель 6c5a4e2c12
Коммит 6273b7f8ed
1 изменённых файлов: 12 добавлений и 11 удалений
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23
fs/btrfs/extent_io.c
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@ -2760,7 +2760,7 @@ static int merge_bio(struct extent_io_tree *tree, struct page *page,
*/
static int submit_extent_page(unsigned int opf, struct extent_io_tree *tree,
struct writeback_control *wbc,
struct page *page, sector_t sector,
struct page *page, u64 offset,
size_t size, unsigned long pg_offset,
struct block_device *bdev,
struct bio **bio_ret,
@ -2775,6 +2775,7 @@ static int submit_extent_page(unsigned int opf, struct extent_io_tree *tree,
int contig = 0;
int old_compressed = prev_bio_flags & EXTENT_BIO_COMPRESSED;
size_t page_size = min_t(size_t, size, PAGE_SIZE);
sector_t sector = offset >> 9;
if (bio_ret && *bio_ret) {
bio = *bio_ret;
@ -2800,7 +2801,7 @@ static int submit_extent_page(unsigned int opf, struct extent_io_tree *tree,
}
}
bio = btrfs_bio_alloc(bdev, (u64)sector << 9);
bio = btrfs_bio_alloc(bdev, offset);
bio_add_page(bio, page, page_size, pg_offset);
bio->bi_end_io = end_io_func;
bio->bi_private = tree;
@ -2891,7 +2892,6 @@ static int __do_readpage(struct extent_io_tree *tree,
u64 last_byte = i_size_read(inode);
u64 block_start;
u64 cur_end;
sector_t sector;
struct extent_map *em;
struct block_device *bdev;
int ret = 0;
@ -2927,6 +2927,7 @@ static int __do_readpage(struct extent_io_tree *tree,
}
while (cur <= end) {
bool force_bio_submit = false;
u64 offset;
if (cur >= last_byte) {
char *userpage;
@ -2966,9 +2967,9 @@ static int __do_readpage(struct extent_io_tree *tree,
iosize = ALIGN(iosize, blocksize);
if (this_bio_flag & EXTENT_BIO_COMPRESSED) {
disk_io_size = em->block_len;
sector = em->block_start >> 9;
offset = em->block_start;
} else {
sector = (em->block_start + extent_offset) >> 9;
offset = em->block_start + extent_offset;
disk_io_size = iosize;
}
bdev = em->bdev;
@ -3061,8 +3062,8 @@ static int __do_readpage(struct extent_io_tree *tree,
}
ret = submit_extent_page(REQ_OP_READ | read_flags, tree, NULL,
page, sector, disk_io_size, pg_offset,
bdev, bio,
page, offset, disk_io_size,
pg_offset, bdev, bio,
end_bio_extent_readpage, mirror_num,
*bio_flags,
this_bio_flag,
@ -3323,7 +3324,6 @@ static noinline_for_stack int __extent_writepage_io(struct inode *inode,
u64 extent_offset;
u64 block_start;
u64 iosize;
sector_t sector;
struct extent_map *em;
struct block_device *bdev;
size_t pg_offset = 0;
@ -3366,6 +3366,7 @@ static noinline_for_stack int __extent_writepage_io(struct inode *inode,
while (cur <= end) {
u64 em_end;
u64 offset;
if (cur >= i_size) {
if (tree->ops && tree->ops->writepage_end_io_hook)
@ -3387,7 +3388,7 @@ static noinline_for_stack int __extent_writepage_io(struct inode *inode,
BUG_ON(end < cur);
iosize = min(em_end - cur, end - cur + 1);
iosize = ALIGN(iosize, blocksize);
sector = (em->block_start + extent_offset) >> 9;
offset = em->block_start + extent_offset;
bdev = em->bdev;
block_start = em->block_start;
compressed = test_bit(EXTENT_FLAG_COMPRESSED, &em->flags);
@ -3430,7 +3431,7 @@ static noinline_for_stack int __extent_writepage_io(struct inode *inode,
}
ret = submit_extent_page(REQ_OP_WRITE | write_flags, tree, wbc,
page, sector, iosize, pg_offset,
page, offset, iosize, pg_offset,
bdev, &epd->bio,
end_bio_extent_writepage,
0, 0, 0, false);
@ -3744,7 +3745,7 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
clear_page_dirty_for_io(p);
set_page_writeback(p);
ret = submit_extent_page(REQ_OP_WRITE | write_flags, tree, wbc,
p, offset >> 9, PAGE_SIZE, 0, bdev,
p, offset, PAGE_SIZE, 0, bdev,
&epd->bio,
end_bio_extent_buffer_writepage,
0, 0, 0, false);