On some distros, there are conflicts w.r.t to redefinition
of pkey syscall numbers which cause build failures. This
fixes them.

Reported-by: Sachin Sant <sach...@linux.vnet.ibm.com>
Signed-off-by: Sandipan Das <sandi...@linux.ibm.com>
---
Previous versions can be found at:
v2: 
https://lore.kernel.org/linuxppc-dev/566dde119ce71f00f9642807ba30ceb7f54c9bfa.1596441105.git.sandi...@linux.ibm.com/
v1: 
https://lore.kernel.org/linuxppc-dev/20200803074043.466809-1-sandi...@linux.ibm.com/

Changes in v3:
- Use ifndef...endif instead of undef as suggested by
  Michael.

Changes in v2:
- Fix incorrect commit message.

---
 tools/testing/selftests/powerpc/include/pkeys.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/testing/selftests/powerpc/include/pkeys.h 
b/tools/testing/selftests/powerpc/include/pkeys.h
index 6ba95039a034..54bf9aa9e1e1 100644
--- a/tools/testing/selftests/powerpc/include/pkeys.h
+++ b/tools/testing/selftests/powerpc/include/pkeys.h
@@ -31,9 +31,17 @@
 
 #define SI_PKEY_OFFSET 0x20
 
+#ifndef SYS_pkey_mprotect
 #define SYS_pkey_mprotect      386
+#endif
+
+#ifndef SYS_pkey_alloc
 #define SYS_pkey_alloc         384
+#endif
+
+#ifndef SYS_pkey_free
 #define SYS_pkey_free          385
+#endif
 
 #define PKEY_BITS_PER_PKEY     2
 #define NR_PKEYS               32
-- 
2.25.1

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