Re: [PATCH 1/2] selftests: vm: Do not override definition of ARCH

[Michael Ellerman <mpe@ellerman.id.au>]

Sandipan Das <sandipan@linux.ibm.com> writes:
> Independent builds of the vm selftests is currently broken
> because commit 7549b3364201 overrides the value of ARCH with
> the machine name from uname. This does not always match the
> architecture names used for tasks like header installation.
>
> E.g. for building tests on powerpc64, we need ARCH=powerpc
> and not ARCH=ppc64 or ARCH=ppc64le. Otherwise, the build
> fails as shown below.
>
>   $ uname -m
>   ppc64le
>
>   $ make -C tools/testing/selftests/vm
>   make: Entering directory '/home/sandipan/linux/tools/testing/selftests/vm'
>   make --no-builtin-rules ARCH=ppc64le -C ../../../.. headers_install
>   make[1]: Entering directory '/home/sandipan/linux'
>   Makefile:653: arch/ppc64le/Makefile: No such file or directory
>   make[1]: *** No rule to make target 'arch/ppc64le/Makefile'.  Stop.
>   make[1]: Leaving directory '/home/sandipan/linux'
>   ../lib.mk:50: recipe for target 'khdr' failed
>   make: *** [khdr] Error 2
>   make: Leaving directory '/home/sandipan/linux/tools/testing/selftests/vm'
>
> Fixes: 7549b3364201 ("selftests: vm: Build/Run 64bit tests only on 64bit arch")
> Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
> ---
>  tools/testing/selftests/vm/Makefile | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Tested-by: Michael Ellerman <mpe@ellerman.id.au>

cheers

> diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
> index 7f9a8a8c31da..3f2e2f0ccbc9 100644
> --- a/tools/testing/selftests/vm/Makefile
> +++ b/tools/testing/selftests/vm/Makefile
> @@ -1,7 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0
>  # Makefile for vm selftests
>  uname_M := $(shell uname -m 2>/dev/null || echo not)
> -ARCH ?= $(shell echo $(uname_M) | sed -e 's/aarch64.*/arm64/')
> +MACHINE ?= $(shell echo $(uname_M) | sed -e 's/aarch64.*/arm64/')
>  
>  CFLAGS = -Wall -I ../../../../usr/include $(EXTRA_CFLAGS)
>  LDLIBS = -lrt
> @@ -19,7 +19,7 @@ TEST_GEN_FILES += thuge-gen
>  TEST_GEN_FILES += transhuge-stress
>  TEST_GEN_FILES += userfaultfd
>  
> -ifneq (,$(filter $(ARCH),arm64 ia64 mips64 parisc64 ppc64 riscv64 s390x sh64 sparc64 x86_64))
> +ifneq (,$(filter $(MACHINE),arm64 ia64 mips64 parisc64 ppc64 riscv64 s390x sh64 sparc64 x86_64))
>  TEST_GEN_FILES += va_128TBswitch
>  TEST_GEN_FILES += virtual_address_range
>  endif
> -- 
> 2.17.1