linux-kernel - [PATCH 1/3] vsyscall_64: add missing ifdef CONFIG

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Date:	Sat, 14 Jul 2012 10:32:52 -0500
From:	Will Drewry <wad@...omium.org>
To:	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org
Cc:	fengxj325@...il.com, eparis@...hat.com, keescook@...omium.org,
	james.l.morris@...cle.com, hpa@...or.com, cevans@...omium.org,
	luto@....edu, rob@...dley.net, linux-doc@...r.kernel.org,
	Will Drewry <wad@...omium.org>
Subject: [PATCH 1/3] vsyscall_64: add missing ifdef CONFIG_SECCOMP

vsyscall_seccomp introduced a dependency on __secure_computing.  On
configurations with CONFIG_SECCOMP disabled, compilation will fail.

Reported-by: feng xiangjun <fengxj325@...il.com>
Signed-off-by: Will Drewry <wad@...omium.org>
---
 arch/x86/kernel/vsyscall_64.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index 08a18d0..5db36ca 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -139,6 +139,7 @@ static int addr_to_vsyscall_nr(unsigned long addr)
 	return nr;
 }
 
+#ifdef CONFIG_SECCOMP
 static int vsyscall_seccomp(struct task_struct *tsk, int syscall_nr)
 {
 	if (!seccomp_mode(&tsk->seccomp))
@@ -147,6 +148,9 @@ static int vsyscall_seccomp(struct task_struct *tsk, int syscall_nr)
 	task_pt_regs(tsk)->ax = syscall_nr;
 	return __secure_computing(syscall_nr);
 }
+#else
+#define vsyscall_seccomp(_tsk, _nr) 0
+#endif
 
 static bool write_ok_or_segv(unsigned long ptr, size_t size)
 {
-- 
1.7.9.5

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