x86: signal: cosmetic unification of sys_rt_sigreturn()

Impact: cleanup

Add #ifdef directive for unification.
Signed-off-by: NHiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/signal_32.c

@@ -299,12 +299,19 @@ static long do_rt_sigreturn(struct pt_regs *regs)
 	return 0;
 }
 
+#ifdef CONFIG_X86_32
 asmlinkage int sys_rt_sigreturn(unsigned long __unused)
 {
 	struct pt_regs *regs = (struct pt_regs *)&__unused;
 
 	return do_rt_sigreturn(regs);
 }
+#else /* !CONFIG_X86_32 */
+asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
+{
+	return do_rt_sigreturn(regs);
+}
+#endif /* CONFIG_X86_32 */
 
 /*
  * Set up a signal frame.

arch/x86/kernel/signal_64.c

@@ -169,10 +169,19 @@ static long do_rt_sigreturn(struct pt_regs *regs)
 	return 0;
 }
 
+#ifdef CONFIG_X86_32
+asmlinkage int sys_rt_sigreturn(unsigned long __unused)
+{
+	struct pt_regs *regs = (struct pt_regs *)&__unused;
+
+	return do_rt_sigreturn(regs);
+}
+#else /* !CONFIG_X86_32 */
 asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 {
 	return do_rt_sigreturn(regs);
 }
+#endif /* CONFIG_X86_32 */
 
 /*
  * Set up a signal frame.