diff options
Diffstat (limited to 'fs/btrfs/subpage.c')
| -rw-r--r-- | fs/btrfs/subpage.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c index 640bcd21bf28..3c311841cdee 100644 --- a/fs/btrfs/subpage.c +++ b/fs/btrfs/subpage.c @@ -559,3 +559,23 @@ IMPLEMENT_BTRFS_PAGE_OPS(writeback, set_page_writeback, end_page_writeback, PageWriteback); IMPLEMENT_BTRFS_PAGE_OPS(ordered, SetPageOrdered, ClearPageOrdered, PageOrdered); + +/* + * Make sure not only the page dirty bit is cleared, but also subpage dirty bit + * is cleared. + */ +void btrfs_page_assert_not_dirty(const struct btrfs_fs_info *fs_info, + struct page *page) +{ + struct btrfs_subpage *subpage = (struct btrfs_subpage *)page->private; + + if (!IS_ENABLED(CONFIG_BTRFS_ASSERT)) + return; + + ASSERT(!PageDirty(page)); + if (fs_info->sectorsize == PAGE_SIZE) + return; + + ASSERT(PagePrivate(page) && page->private); + ASSERT(subpage->dirty_bitmap == 0); +} |