Refactor code to use `clear_and_wake_up_bit()` instead of manual calls
to:
       	clear_bit_unlock();
	smp_mb__after_atomic();
	wake_up_bit();

The helper function `clear_and_wake_up_bit()` was introduced in
'commit 8236b0ae31c83 ("bdi: wake up concurrent wb_shutdown()
callers.")' as a generic way of doing the same sequence of operations,
but several pieces of code still remain.

Replace manual calls to the operations by a single call to
`clear_and_wake_up_bit()` to deduplicate code and standardize pathways.

TESTING
=======
Boot-tested on an x86_64 QEMU virtual machine. Basic filesystem
operations (create, delete, sync) were performed on an ext4 filesystem
with `data=journal` modes. No issues were observed.

Suggested-by: shuo chen <1289151713@qq.com>
Link: https://lore.kernel.org/kernelnewbies/agzoqV835-co4kAN@guidai/T/#t
Signed-off-by: Agatha Isabelle Moreira <code@agatha.dev>
---

Agatha Isabelle Moreira (2):
  fs: buffer: use clear_and_wake_up_bit() in unlock_buffer()
  fs: jbd2: use clear_and_wake_up_bit() in journal_end_buffer_io_sync()

 fs/buffer.c      | 4 +---
 fs/jbd2/commit.c | 4 +---
 2 files changed, 2 insertions(+), 6 deletions(-)

-- 
2.53.0

On Wed, 20 May 2026 16:45:35 -0300, Agatha Isabelle Moreira wrote:
> Refactor code to use `clear_and_wake_up_bit()` instead of manual calls
> to:
>        	clear_bit_unlock();
> 	smp_mb__after_atomic();
> 	wake_up_bit();
> 
> The helper function `clear_and_wake_up_bit()` was introduced in
> 'commit 8236b0ae31c83 ("bdi: wake up concurrent wb_shutdown()
> callers.")' as a generic way of doing the same sequence of operations,
> but several pieces of code still remain.
> 
> [...]

Applied to the vfs-7.2.misc branch of the vfs/vfs.git tree.
Patches in the vfs-7.2.misc branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs-7.2.misc

[1/2] fs: buffer: use clear_and_wake_up_bit() in unlock_buffer()
      https://git.kernel.org/vfs/vfs/c/89aafbd6d52b
[2/2] fs: jbd2: use clear_and_wake_up_bit() in journal_end_buffer_io_sync()
      https://git.kernel.org/vfs/vfs/c/d7a7e95e5f50