[PATCH] lib/decompress_unxz.c: removing all memory helper functions

On 10:03 Thu 24 May     , T Makphaibulchoke wrote:

The patch cleans up the file lib/decompress_unxz.c by removing all memory
helper functions, e.g., memmove.  By doing so, any architecture's preboot
environment supporting the XZ decompression needs to define its own copy of
any of the missing memory helper functions.

The patch makes sure that all 4 architectures' preboot currently supporting
the XZ decompressor, arm, s390, sh and x86, build without error when using
the XZ compression.

Adding a prototype for the memcmp function required by the XZ decompressor to
workaround compiler's implicit type error.  Also removing both the memmove and
memcpy defines workaround, to disable lib/decompress_unxz.c from duplicating
both functions.

Adding the missing memcmp function, required by the XZ decompressor, to the
s390 preboot environment.

Adding both the missing memmove and memcmp functions, required by the XZ
decompressor, to the sh preboot environment.

Adding the missing memmove function, required by XZ decompressor, to the x86
preboot environment.

Signed-off-by: T. Makphaibulchoke <redacted>
---
 arch/arm/boot/compressed/decompress.c |    3 +-
 arch/s390/boot/compressed/misc.c      |   14 +++++
 arch/sh/boot/compressed/misc.c        |   32 ++++++++++++
 arch/x86/boot/compressed/string.c     |   18 +++++++a

can we do not duplicate those functions?

Best Regards,
J.