linux-kernel - [tip:x86/asm] selftests/x86/protection_keys: Fix syscall NR redefinition warnings

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Date:   Tue, 7 Nov 2017 02:16:38 -0800
From:   tip-bot for Andy Lutomirski <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     torvalds@...ux-foundation.org, dave.hansen@...el.com,
        linux-kernel@...r.kernel.org, bpetkov@...e.de, mingo@...nel.org,
        tglx@...utronix.de, peterz@...radead.org, hpa@...or.com,
        luto@...nel.org
Subject: [tip:x86/asm] selftests/x86/protection_keys: Fix syscall NR
 redefinition warnings

Commit-ID:  693cb5580fdb026922363aa103add64b3ecd572e
Gitweb:     https://git.kernel.org/tip/693cb5580fdb026922363aa103add64b3ecd572e
Author:     Andy Lutomirski <luto@...nel.org>
AuthorDate: Sat, 4 Nov 2017 04:19:48 -0700
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 7 Nov 2017 11:13:42 +0100

selftests/x86/protection_keys: Fix syscall NR redefinition warnings

On new enough glibc, the pkey syscalls numbers are available.  Check
first before defining them to avoid warnings like:

protection_keys.c:198:0: warning: "SYS_pkey_alloc" redefined

Signed-off-by: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bpetkov@...e.de>
Cc: Dave Hansen <dave.hansen@...el.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: stable@...r.kernel.org
Link: http://lkml.kernel.org/r/1fbef53a9e6befb7165ff855fc1a7d4788a191d6.1509794321.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 tools/testing/selftests/x86/protection_keys.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/x86/protection_keys.c b/tools/testing/selftests/x86/protection_keys.c
index 555e43c..7a1cc0e 100644
--- a/tools/testing/selftests/x86/protection_keys.c
+++ b/tools/testing/selftests/x86/protection_keys.c
@@ -189,17 +189,29 @@ void lots_o_noops_around_write(int *write_to_me)
 #define u64 uint64_t
 
 #ifdef __i386__
-#define SYS_mprotect_key 380
-#define SYS_pkey_alloc	 381
-#define SYS_pkey_free	 382
+
+#ifndef SYS_mprotect_key
+# define SYS_mprotect_key 380
+#endif
+#ifndef SYS_pkey_alloc
+# define SYS_pkey_alloc	 381
+# define SYS_pkey_free	 382
+#endif
 #define REG_IP_IDX REG_EIP
 #define si_pkey_offset 0x14
+
 #else
-#define SYS_mprotect_key 329
-#define SYS_pkey_alloc	 330
-#define SYS_pkey_free	 331
+
+#ifndef SYS_mprotect_key
+# define SYS_mprotect_key 329
+#endif
+#ifndef SYS_pkey_alloc
+# define SYS_pkey_alloc	 330
+# define SYS_pkey_free	 331
+#endif
 #define REG_IP_IDX REG_RIP
 #define si_pkey_offset 0x20
+
 #endif
 
 void dump_mem(void *dumpme, int len_bytes)