[PATCH AUTOSEL 5.9 23/23] tools/testing/selftests/vm: fix build error

From: Xingxing Su <redacted>

[ Upstream commit d8cbe8bfa7df3c680ddfd5e1eee3a5c86d8dc764 ]

Only x86 and PowerPC implement the pkey-xxx.h, and an error was reported
when compiling protection_keys.c.

Add a Arch judgment to compile "protection_keys" in the Makefile.

If other arch implement this, add the arch name to the Makefile.
eg:
    ifneq (,$(findstring $(ARCH),powerpc mips ... ))

Following build errors:

    pkey-helpers.h:93:2: error: #error Architecture not supported
     #error Architecture not supported
    pkey-helpers.h:96:20: error: `PKEY_DISABLE_ACCESS' undeclared
     #define PKEY_MASK (PKEY_DISABLE_ACCESS | PKEY_DISABLE_WRITE)
                        ^
    protection_keys.c:218:45: error: `PKEY_DISABLE_WRITE' undeclared
     pkey_assert(flags & (PKEY_DISABLE_ACCESS | PKEY_DISABLE_WRITE));
                                                ^

Signed-off-by: Xingxing Su <redacted>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Sandipan Das <redacted>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Dave Hansen <redacted>
Cc: "Kirill A. Shutemov" <redacted>
Cc: Brian Geffon <redacted>
Cc: Mina Almasry <redacted>
Link: https://lkml.kernel.org/r/1606826876-30656-1-git-send-email-suxingxing@loongson.cn
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/testing/selftests/vm/Makefile | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index a9026706d597d..ac76a78249739 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile

@@ -43,9 +43,13 @@ ifeq ($(CAN_BUILD_X86_64),1)
 TEST_GEN_FILES += $(BINARIES_64)
 endif
 else
+
+ifneq (,$(findstring $(ARCH),powerpc))
 TEST_GEN_FILES += protection_keys
 endif
 
+endif
+
 ifneq (,$(filter $(MACHINE),arm64 ia64 mips64 parisc64 ppc64 ppc64le riscv64 s390x sh64 sparc64 x86_64))
 TEST_GEN_FILES += va_128TBswitch
 TEST_GEN_FILES += virtual_address_range

-- 
2.27.0