[PATCH v2 2/6] selftests: only compile userfaultfd for x86 and powperpc

[Bamvor Jian Zhang]

Check it before compiling to avoid the failure of building and
installation.

Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@xxxxxxxxxx>
---

 tools/testing/selftests/vm/Makefile | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index 1dacac8..925a82d 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -1,5 +1,15 @@
 # Makefile for vm selftests
 
+uname_M := $(shell uname -m 2>/dev/null || echo not)
+ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/i386/ -e s/ppc.*/powerpc/)
+
+ifeq ($(ARCH),powerpc)
+support_userfaultfd = yes
+endif
+ifeq ($(ARCH),x86)
+support_userfaultfd = yes
+endif
+
 CFLAGS = -Wall -I ../../../../usr/include $(EXTRA_CFLAGS)
 BINARIES = compaction_test
 BINARIES += hugepage-mmap
@@ -9,7 +19,9 @@ BINARIES += mlock2-tests
 BINARIES += on-fault-limit
 BINARIES += thuge-gen
 BINARIES += transhuge-stress
+ifdef support_userfaultfd
 BINARIES += userfaultfd
+endif
 
 all: $(BINARIES)
 %: %.c
-- 
2.1.4

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