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>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 4438aac..a762f91 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -420,7 +420,7 @@ static int btree_read_extent_buffer_pages(struct btrfs_root *root,
 static int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
 {
        struct extent_io_tree *tree;
-       u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
+       u64 start = page_offset(page);
        u64 found_start;
        struct extent_buffer *eb;
 

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 1b319df..bda36fe 100644 (file)
--- 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) &&

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 1ea0988..35d1524 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2062,7 +2062,7 @@ static int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end,
 static int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end,
                               struct extent_state *state, int mirror)
 {
-       size_t offset = start - ((u64)page->index << PAGE_CACHE_SHIFT);
+       size_t offset = start - page_offset(page);
        struct inode *inode = page->mapping->host;
        struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
        char *kaddr;
@@ -6752,8 +6752,7 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset)
                return;
        }
        lock_extent_bits(tree, page_start, page_end, 0, &cached_state);
-       ordered = btrfs_lookup_ordered_extent(inode,
-                                          page_offset(page));
+       ordered = btrfs_lookup_ordered_extent(inode, page_offset(page));
        if (ordered) {
                /*
                 * IO on this page will never be started, so we need

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 300e09a..ba5a321 100644 (file)
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3017,7 +3017,7 @@ static int relocate_file_extent_cluster(struct inode *inode,
                        }
                }
 
-               page_start = (u64)page->index << PAGE_CACHE_SHIFT;
+               page_start = page_offset(page);
                page_end = page_start + PAGE_CACHE_SIZE - 1;
 
                lock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end);