Re: [RFC 12/12] iscsi-target: Add Makefile/Kconfig and update TCM top level

On Wed, Mar 02, 2011 at 01:32:11PM -0800, Nicholas A. Bellinger wrote:

The kernel code itself that is specific to using the SSE v4.2
instruction for CRC32C offload are using #ifdef CONFIG_X86 stubs in
iscsi_target_login.c:iscsi_login_setup_crypto(), and !CONFIG_X86 will
default to using the unoptimized 1x8 slicing soft CRC32C code.  This
particular piece of logic has been tested on powerpc and arm and is
funcitoning as expected from the kernel level using the arch independent
soft code.

I don't think you need that code at all.  The crypto code is structured
to prefer the optimized implementation if it is present.  Just stripping
the x86-specific code out and always requesting the plain crc32c
algorithm should give you the optimized one if it is present on your
system.

Please give it a try.