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x86/entry/vsyscall: Fix undefined symbol warning

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Commit:

  3dc33bd30f ("x86/entry/vsyscall: Add CONFIG to control default")

did the ifdef/elif thing but GCC doesn't like that:

  arch/x86/entry/vsyscall/vsyscall_64.c:44:7: warning: "CONFIG_LEGACY_VSYSCALL_NONE" is not defined [-Wundef]
   #elif CONFIG_LEGACY_VSYSCALL_NONE
         ^

Use defined() instead.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20150921074829.GA3550@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Borislav Petkov 2015-09-21 09:48:29 +02:00 committed by Ingo Molnar
parent 3dc33bd30f
commit 93f13a9f96
1 changed files with 2 additions and 2 deletions
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4
arch/x86/entry/vsyscall/vsyscall_64.c
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@ -39,9 +39,9 @@
#include "vsyscall_trace.h"
static enum { EMULATE, NATIVE, NONE } vsyscall_mode =
#ifdef CONFIG_LEGACY_VSYSCALL_NATIVE
#if defined(CONFIG_LEGACY_VSYSCALL_NATIVE)
NATIVE;
#elif CONFIG_LEGACY_VSYSCALL_NONE
#elif defined(CONFIG_LEGACY_VSYSCALL_NONE)
NONE;
#else
EMULATE;