Qu Wenruo 3470da3b7d btrfs: subpage: introduce helpers for writeback status ...

Introduces the following functions to handle subpage writeback status:

- btrfs_subpage_set_writeback()
- btrfs_subpage_clear_writeback()
- btrfs_subpage_test_writeback()
  These helpers can only be called when the range is ensured to be
  inside the page.

- btrfs_page_set_writeback()
- btrfs_page_clear_writeback()
- btrfs_page_test_writeback()
  These helpers can handle both regular sector size and subpage without
  problem.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

2021-04-19 17:25:18 +02:00

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