Merge patch series "iomap preliminaries for large atomic write for xfs with CoW"

Merge patch series "iomap preliminaries for large atomic write for xfs with CoW"

Bring in the iomap changes required for xfs to support large atomic
write with CoW.

* patches from https://lore.kernel.org/r/20250303171120.2837067-1-john.g.garry@oracle.com:
  iomap: Lift blocksize restriction on atomic writes
  iomap: Support SW-based atomic writes
  iomap: Rename IOMAP_ATOMIC -> IOMAP_ATOMIC_HW

Link: https://lore.kernel.org/r/20250303171120.2837067-1-john.g.garry@oracle.com
Signed-off-by: Christian Brauner <brauner@kernel.org>