[PATCH] Fix vm selftest to run tests with make

[Harish]

The last patch overrides the ARCH env variable and hence runs
using make fails with the following.

$ make -C vm/
make: Entering directory '/home/harish/linux/tools/testing/selftests/vm'
make --no-builtin-rules ARCH=ppc64le -C ../../../.. headers_install
make[1]: Entering directory '/home/harish/linux'
Makefile:652: arch/ppc64le/Makefile: No such file or directory
make[1]: *** No rule to make target 'arch/ppc64le/Makefile'.  Stop.
make[1]: Leaving directory '/home/harish/linux'
make: *** [../lib.mk:50: khdr] Error 2
make: Leaving directory '/home/harish/linux/tools/testing/selftests/vm'

This patch fixes it and also handles ppc64/ppc64le arch's to build
and run 64bit tests

Signed-off-by: Harish <harish at linux.ibm.com>
---
 tools/testing/selftests/vm/Makefile    | 5 +++--
 tools/testing/selftests/vm/run_vmtests | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index 7f9a8a8c31da..ef6218283b68 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/')
+ARCH_USED ?= $(shell echo $(uname_M) | sed -e 's/aarch64.*/arm64/' -e 's/ppc64.*/ppc64/')
 
 CFLAGS = -Wall -I ../../../../usr/include $(EXTRA_CFLAGS)
 LDLIBS = -lrt
@@ -19,11 +19,12 @@ 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 $(ARCH_USED),arm64 ia64 mips64 parisc64 ppc64 riscv64 s390x sh64 sparc64 x86_64))
 TEST_GEN_FILES += va_128TBswitch
 TEST_GEN_FILES += virtual_address_range
 endif
 
+
 TEST_PROGS := run_vmtests
 
 TEST_FILES := test_vmalloc.sh
diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests
index a692ea828317..da63dfb9713a 100755
--- a/tools/testing/selftests/vm/run_vmtests
+++ b/tools/testing/selftests/vm/run_vmtests
@@ -61,7 +61,7 @@ fi
 #filter 64bit architectures
 ARCH64STR="arm64 ia64 mips64 parisc64 ppc64 riscv64 s390x sh64 sparc64 x86_64"
 if [ -z $ARCH ]; then
-  ARCH=`uname -m 2>/dev/null | sed -e 's/aarch64.*/arm64/'`
+  ARCH=`uname -m 2>/dev/null | sed -e 's/aarch64.*/arm64/' -e 's/ppc64.*/ppc64/'`
 fi
 VADDR64=0
 echo "$ARCH64STR" | grep $ARCH && VADDR64=1
-- 
2.21.0