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selftests: vm: enable cross-compilation

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Selftests vm builds break when doing cross-compilation.  The Makefile
MACHINE variable incorrectly picks upp the host machine architecture.

If the CROSS_COMPILE variable is set, dig out the target host architecture
from CROSS_COMPILE, instead of calling uname.

Link: https://lkml.kernel.org/r/20230109114251.3349638-1-bjorn@kernel.org
Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Björn Töpel 2023-01-09 12:42:51 +01:00 committed by Andrew Morton
parent d526643f15
commit 9a3f21fe5c
1 changed files with 4 additions and 0 deletions
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4
tools/testing/selftests/mm/Makefile
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@ -5,7 +5,11 @@ LOCAL_HDRS += $(selfdir)/mm/local_config.h $(top_srcdir)/mm/gup_test.h
include local_config.mk
ifeq ($(CROSS_COMPILE),)
uname_M := $(shell uname -m 2>/dev/null || echo not)
else
uname_M := $(shell echo $(CROSS_COMPILE) | grep -o '^[a-z0-9]\+')
endif
MACHINE ?= $(shell echo $(uname_M) | sed -e 's/aarch64.*/arm64/' -e 's/ppc64.*/ppc64/')
# Without this, failed build products remain, with up-to-date timestamps,