[PATCH 7.2 0/2] ublk: enable UBLK_F_SHMEM_ZC on zone appends

[Caleb Sander Mateos <csander@purestorage.com>]

Commit 4d4a512a1f87 ("ublk: add PFN-based buffer matching in I/O path")
added support to ublk_setup_iod() for matching request buffers against
registered UBLK_F_SHMEM_ZC buffers, but missed adding it to
ublk_setup_iod_zoned() for zoned requests. ublk_setup_iod_zoned()
duplicates the code for initializing struct ublksrv_io_desc, making it
easy to forget to keep them in sync. Move the common code to a helper
function ublk_init_iod(). This allows zone appends to leverage the
shared memory zero copy optimization.

This series is based on "ublk: optimize ublk_rq_has_data()" [1]

[1]: https://lore.kernel.org/linux-block/20260513211846.1956810-1-csander@purestorage.com/

Caleb Sander Mateos (2):
  ublk: move ublk_req_build_flags() earlier
  ublk: factor out ublk_init_iod() helper

 drivers/block/ublk_drv.c | 123 +++++++++++++++++++--------------------
 1 file changed, 60 insertions(+), 63 deletions(-)

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2.54.0