x86/entry/vsyscall: Fix undefined symbol warning
commit93f13a9f96771a064c716364aebc6e283b186eb8
authorBorislav Petkov <bp@alien8.de>
Mon, 21 Sep 2015 07:48:29 +0000 (21 09:48 +0200)
committerIngo Molnar <mingo@kernel.org>
Mon, 21 Sep 2015 07:56:59 +0000 (21 09:56 +0200)
tree6bc216ff5bd3a6caf39c6f1230ff239c1fdb6253
parent3dc33bd30f3e1c1bcaaafa3482737694debf0f0b
x86/entry/vsyscall: Fix undefined symbol warning

Commit:

  3dc33bd30f3e1 ("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>
arch/x86/entry/vsyscall/vsyscall_64.c