diff options
Diffstat (limited to 'fs/btrfs/subpage.h')
| -rw-r--r-- | fs/btrfs/subpage.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/btrfs/subpage.h b/fs/btrfs/subpage.h index f3c5def313a1..b86a4881475d 100644 --- a/fs/btrfs/subpage.h +++ b/fs/btrfs/subpage.h @@ -29,6 +29,9 @@ struct btrfs_subpage { */ atomic_t eb_refs; /* Structures only used by data */ + struct { + atomic_t readers; + }; }; }; @@ -53,6 +56,11 @@ void btrfs_page_inc_eb_refs(const struct btrfs_fs_info *fs_info, void btrfs_page_dec_eb_refs(const struct btrfs_fs_info *fs_info, struct page *page); +void btrfs_subpage_start_reader(const struct btrfs_fs_info *fs_info, + struct page *page, u64 start, u32 len); +void btrfs_subpage_end_reader(const struct btrfs_fs_info *fs_info, + struct page *page, u64 start, u32 len); + /* * Template for subpage related operations. * |