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authorMiao Xie <miaox@cn.fujitsu.com>2012-12-21 09:17:45 +0000
committerJosef Bacik <jbacik@fusionio.com>2013-02-20 09:36:43 -0500
commit4eee4fa4f8ab8c2b2623c22be4c3cb91d525aa57 (patch)
tree683eda1d306b23d1a82a918d869850256237c432 /fs/btrfs/extent_io.c
parentda633a42170165cbf20a2d3886c7480ccc832ec3 (diff)
Btrfs: use wrapper page_offset
Use wrapper page_offset to get byte-offset into filesystem object for page. Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/extent_io.c')
-rw-r--r--fs/btrfs/extent_io.c24
1 files changed, 11 insertions, 13 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 1b319df29eee..bda36fef301e 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1834,7 +1834,7 @@ int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
*/
static void check_page_uptodate(struct extent_io_tree *tree, struct page *page)
{
- u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
+ u64 start = page_offset(page);
u64 end = start + PAGE_CACHE_SIZE - 1;
if (test_range_bit(tree, start, end, EXTENT_UPTODATE, 1, NULL))
SetPageUptodate(page);
@@ -1846,7 +1846,7 @@ static void check_page_uptodate(struct extent_io_tree *tree, struct page *page)
*/
static void check_page_locked(struct extent_io_tree *tree, struct page *page)
{
- u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
+ u64 start = page_offset(page);
u64 end = start + PAGE_CACHE_SIZE - 1;
if (!test_range_bit(tree, start, end, EXTENT_LOCKED, 0, NULL))
unlock_page(page);
@@ -1960,7 +1960,7 @@ int repair_io_failure(struct btrfs_fs_info *fs_info, u64 start,
return -EIO;
}
bio->bi_bdev = dev->bdev;
- bio_add_page(bio, page, length, start-page_offset(page));
+ bio_add_page(bio, page, length, start - page_offset(page));
btrfsic_submit_bio(WRITE_SYNC, bio);
wait_for_completion(&compl);
@@ -2293,8 +2293,7 @@ static void end_bio_extent_writepage(struct bio *bio, int err)
struct page *page = bvec->bv_page;
tree = &BTRFS_I(page->mapping->host)->io_tree;
- start = ((u64)page->index << PAGE_CACHE_SHIFT) +
- bvec->bv_offset;
+ start = page_offset(page) + bvec->bv_offset;
end = start + bvec->bv_len - 1;
if (bvec->bv_offset == 0 && bvec->bv_len == PAGE_CACHE_SIZE)
@@ -2353,8 +2352,7 @@ static void end_bio_extent_readpage(struct bio *bio, int err)
(long int)bio->bi_bdev);
tree = &BTRFS_I(page->mapping->host)->io_tree;
- start = ((u64)page->index << PAGE_CACHE_SHIFT) +
- bvec->bv_offset;
+ start = page_offset(page) + bvec->bv_offset;
end = start + bvec->bv_len - 1;
if (bvec->bv_offset == 0 && bvec->bv_len == PAGE_CACHE_SIZE)
@@ -2471,7 +2469,7 @@ static int __must_check submit_one_bio(int rw, struct bio *bio,
struct extent_io_tree *tree = bio->bi_private;
u64 start;
- start = ((u64)page->index << PAGE_CACHE_SHIFT) + bvec->bv_offset;
+ start = page_offset(page) + bvec->bv_offset;
bio->bi_private = NULL;
@@ -2595,7 +2593,7 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
unsigned long *bio_flags)
{
struct inode *inode = page->mapping->host;
- u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
+ u64 start = page_offset(page);
u64 page_end = start + PAGE_CACHE_SIZE - 1;
u64 end;
u64 cur = start;
@@ -2806,7 +2804,7 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc,
struct inode *inode = page->mapping->host;
struct extent_page_data *epd = data;
struct extent_io_tree *tree = epd->tree;
- u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
+ u64 start = page_offset(page);
u64 delalloc_start;
u64 page_end = start + PAGE_CACHE_SIZE - 1;
u64 end;
@@ -3674,7 +3672,7 @@ int extent_invalidatepage(struct extent_io_tree *tree,
struct page *page, unsigned long offset)
{
struct extent_state *cached_state = NULL;
- u64 start = ((u64)page->index << PAGE_CACHE_SHIFT);
+ u64 start = page_offset(page);
u64 end = start + PAGE_CACHE_SIZE - 1;
size_t blocksize = page->mapping->host->i_sb->s_blocksize;
@@ -3700,7 +3698,7 @@ int try_release_extent_state(struct extent_map_tree *map,
struct extent_io_tree *tree, struct page *page,
gfp_t mask)
{
- u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
+ u64 start = page_offset(page);
u64 end = start + PAGE_CACHE_SIZE - 1;
int ret = 1;
@@ -3739,7 +3737,7 @@ int try_release_extent_mapping(struct extent_map_tree *map,
gfp_t mask)
{
struct extent_map *em;
- u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
+ u64 start = page_offset(page);
u64 end = start + PAGE_CACHE_SIZE - 1;
if ((mask & __GFP_WAIT) &&