[GIT PULL] Btrfs fixes for 6.12-rc6

[David Sterba]

Hi,

please pull a few more stability fixes. There's one patch adding export
of MIPS cmpxchg helper, used in the error propagation fix.

- fix error propagation from split bios to the original btrfs bio

- fix merging of adjacent extents (normal operation, defragmentation)

- fix potential use after free after freeing btrfs device structures

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The following changes since commit 75f49c3dc7b7423d3734f2e4dabe3dac8d064338:

  btrfs: fix passing 0 to ERR_PTR in btrfs_search_dir_index_item() (2024-10-22 16:10:55 +0200)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git tags/for-6.12-rc5-tag

for you to fetch changes up to 77b0d113eec49a7390ff1a08ca1923e89f5f86c6:

  btrfs: fix defrag not merging contiguous extents due to merged extent maps (2024-10-31 16:46:41 +0100)

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David Sterba (1):
      MIPS: export __cmpxchg_small()

Filipe Manana (2):
      btrfs: fix extent map merging not happening for adjacent extents
      btrfs: fix defrag not merging contiguous extents due to merged extent maps

Naohiro Aota (1):
      btrfs: fix error propagation of split bios

Zhihao Cheng (1):
      btrfs: fix use-after-free of block device file in __btrfs_free_extra_devids()

 arch/mips/kernel/cmpxchg.c |  1 +
 fs/btrfs/bio.c             | 37 +++++++++++++------------------------
 fs/btrfs/bio.h             |  3 +++
 fs/btrfs/defrag.c          | 10 +++++-----
 fs/btrfs/extent_map.c      |  7 ++++++-
 fs/btrfs/volumes.c         |  1 +
 6 files changed, 29 insertions(+), 30 deletions(-)