diff options
Diffstat (limited to 'fs/btrfs/subpage.h')
| -rw-r--r-- | fs/btrfs/subpage.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/btrfs/subpage.h b/fs/btrfs/subpage.h index 97ba2c100b0b..b6dc013b0fdc 100644 --- a/fs/btrfs/subpage.h +++ b/fs/btrfs/subpage.h @@ -33,7 +33,7 @@ struct btrfs_subpage_info { unsigned int total_nr_bits; /* - * *_start indicates where the bitmap starts, the length is always + * *_offset indicates where the bitmap starts, the length is always * @bitmap_size, which is calculated from PAGE_SIZE / sectorsize. */ unsigned int uptodate_offset; @@ -41,6 +41,16 @@ struct btrfs_subpage_info { unsigned int writeback_offset; unsigned int ordered_offset; unsigned int checked_offset; + + /* + * For locked bitmaps, normally it's subpage representation for folio + * Locked flag, but metadata is different: + * + * - Metadata doesn't really lock the folio + * It's just to prevent page::private get cleared before the last + * end_page_read(). + */ + unsigned int locked_offset; }; /* |