[PATCH] selftests/powerpc: Fix pkey syscall redefinitions

[Sandipan Das]

Some distros have the pkey syscall numbers defined under
unistd.h. This conflicts with the definitions in the pkeys
selftest header and causes build failures.

E.g. this works
  $ grep -nr "SYS_pkey" /usr/include/
  /usr/include/bits/syscall.h:1575:# define SYS_pkey_alloc __NR_pkey_alloc
  /usr/include/bits/syscall.h:1579:# define SYS_pkey_free __NR_pkey_free
  /usr/include/bits/syscall.h:1583:# define SYS_pkey_mprotect __NR_pkey_mprotect

While this does not
  $ grep -nr "SYS_pkey" /usr/include/
  /usr/include/bits/syscall.h:1575:# define SYS_pkey_alloc __NR_pkey_alloc
  /usr/include/bits/syscall.h:1579:# define SYS_pkey_free __NR_pkey_free
  /usr/include/bits/syscall.h:1583:# define SYS_pkey_mprotect __NR_pkey_mprotect
  /usr/include/asm-generic/unistd.h:728:__SYSCALL(__NR_pkey_mprotect, sys_pkey_mprotect)
  /usr/include/asm-generic/unistd.h:730:__SYSCALL(__NR_pkey_alloc,    sys_pkey_alloc)
  /usr/include/asm-generic/unistd.h:732:__SYSCALL(__NR_pkey_free,     sys_pkey_free)

Reported-by: Sachin Sant <sachinp at linux.vnet.ibm.com>
Signed-off-by: Sandipan Das <sandipan at linux.ibm.com>
---
 tools/testing/selftests/powerpc/include/pkeys.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/powerpc/include/pkeys.h b/tools/testing/selftests/powerpc/include/pkeys.h
index 6ba95039a034..26eef5c1f8ea 100644
--- a/tools/testing/selftests/powerpc/include/pkeys.h
+++ b/tools/testing/selftests/powerpc/include/pkeys.h
@@ -31,8 +31,13 @@
 
 #define SI_PKEY_OFFSET	0x20
 
+#undef SYS_pkey_mprotect
 #define SYS_pkey_mprotect	386
+
+#undef SYS_pkey_alloc
 #define SYS_pkey_alloc		384
+
+#undef SYS_pkey_free
 #define SYS_pkey_free		385
 
 #define PKEY_BITS_PER_PKEY	2
-- 
2.25.1