[PATCH 0/1] scsi: arm: Convert acornscsi-io.S to C

[Breno Rodrigues Alves <breno3011alves@gmail.com>]

This series contains a single mechanical conversion of the Acorn SCSI
card I/O helpers from ARM assembly to C.

The new acornscsi-io.h carries the prototypes for both helpers and is
included from acornscsi-io.c and acornscsi.c, replacing the
block-scoped extern declarations that the latter used to carry.  The
first argument is now typed as (void __iomem *), matching what
acornscsi.c actually passes; the assembly version had no C prototype,
so the original comment declaring that argument as unsigned int was
never enforced.

No functional change is intended for even-length transfers, which is
what all current callers use.  Odd-length transfers now no longer lose
the final byte.

Testing:
 - userspace unit test mocking readl/writel/writeb verified byte-exact
   equivalence with the original assembly for transfer lengths 0, 2,
   4, 8, 16, 32, 64, 100, 512 and 1000
 - cross-compiled for ARM with arm-linux-gnueabi on rpc_defconfig; the
   module links cleanly and nm shows both helpers as global text
   symbols
 - checkpatch.pl --strict reports 0 errors, 0 warnings, 0 checks
   (FILE_PATH_CHANGES ignored: drivers/scsi/arm/ is already covered by
   MAINTAINERS)

Breno (1):
  scsi: arm: Convert acornscsi-io.S to C

 drivers/scsi/arm/acornscsi-io.S | 116 ------------
 drivers/scsi/arm/acornscsi-io.c | 170 ++++++++++++++++++++++++
 drivers/scsi/arm/acornscsi-io.h |  15 ++++
 drivers/scsi/arm/acornscsi.c    |   3 +-
 4 files changed, 184 insertions(+), 137 deletions(-)