selftests/powerpc: Only test lwm/stmw on big endian
authorMichael Ellerman <mpe@ellerman.id.au>
Tue, 19 Jan 2021 04:18:00 +0000 (15:18 +1100)
committerMichael Ellerman <mpe@ellerman.id.au>
Wed, 20 Jan 2021 00:49:55 +0000 (11:49 +1100)
commitdd3a44c06f7b4f14e90065bf05d62c255b20005f
treed49ce19b7fa0e6a4ad879b10616cea4914c69004
parent92a5e1fdb286851d5bd0eb966b8d075be27cf5ee
selftests/powerpc: Only test lwm/stmw on big endian

Newer binutils (>= 2.36) refuse to assemble lmw/stmw when building in
little endian mode. That breaks compilation of our alignment handler
test:

  /tmp/cco4l14N.s: Assembler messages:
  /tmp/cco4l14N.s:1440: Error: `lmw' invalid when little-endian
  /tmp/cco4l14N.s:1814: Error: `stmw' invalid when little-endian
  make[2]: *** [../../lib.mk:139: /output/kselftest/powerpc/alignment/alignment_handler] Error 1

These tests do pass on little endian machines, as the kernel will
still emulate those instructions even when running little
endian (which is arguably a kernel bug).

But we don't really need to test that case, so ifdef those
instructions out to get the alignment test building again.

Reported-by: Libor Pechacek <lpechacek@suse.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Tested-by: Libor Pechacek <lpechacek@suse.com>
Link: https://lore.kernel.org/r/20210119041800.3093047-1-mpe@ellerman.id.au
tools/testing/selftests/powerpc/alignment/alignment_handler.c