mips: warning fix audit_arch()

arch/mips/kernel/ptrace.c:305: warning: function declaration isn't a prototype
Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index eaf7be9..4abc2ee5 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -300,7 +300,7 @@
 	return ret;
 }
 
-static inline int audit_arch()
+static inline int audit_arch(void)
 {
 #ifdef CONFIG_CPU_LITTLE_ENDIAN
 #ifdef CONFIG_MIPS64