x86: signal: split out frame setups

Make setup_rt_frame() and split out frame setups from handle_signal().
This is for cosmetic unification of handle_signal().
Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/signal_32.c

@@ -338,8 +338,8 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size,
 }
 
 static int
-setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
-	    struct pt_regs *regs)
+__setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
+	      struct pt_regs *regs)
 {
 	struct sigframe __user *frame;
 	void __user *restorer;
@@ -416,8 +416,8 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
 	return -EFAULT;
 }
 
-static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
-			  sigset_t *set, struct pt_regs *regs)
+static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+			    sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame;
 	void __user *restorer;
@@ -501,6 +501,21 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 /*
  * OK, we're invoking a handler:
  */
+static int
+setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+	       sigset_t *set, struct pt_regs *regs)
+{
+	int ret;
+
+	/* Set up the stack frame */
+	if (ka->sa.sa_flags & SA_SIGINFO)
+		ret = __setup_rt_frame(sig, ka, info, set, regs);
+	else
+		ret = __setup_frame(sig, ka, set, regs);
+
+	return ret;
+}
+
 static int
 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 	      sigset_t *oldset, struct pt_regs *regs)
@@ -537,11 +552,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 	    likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
 		regs->flags &= ~X86_EFLAGS_TF;
 
-	/* Set up the stack frame */
-	if (ka->sa.sa_flags & SA_SIGINFO)
-		ret = setup_rt_frame(sig, ka, info, oldset, regs);
-	else
-		ret = setup_frame(sig, ka, oldset, regs);
+	ret = setup_rt_frame(sig, ka, info, oldset, regs);
 
 	if (ret)
 		return ret;

arch/x86/kernel/signal_64.c

@@ -195,8 +195,8 @@ get_stack(struct k_sigaction *ka, struct pt_regs *regs, unsigned long size)
 	return (void __user *)round_down(sp - size, 64);
 }
 
-static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
-			   sigset_t *set, struct pt_regs *regs)
+static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+			    sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame;
 	void __user *fp = NULL;
@@ -280,6 +280,24 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 /*
  * OK, we're invoking a handler
  */
+static int
+setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+	       sigset_t *set, struct pt_regs *regs)
+{
+	int ret;
+
+#ifdef CONFIG_IA32_EMULATION
+	if (test_thread_flag(TIF_IA32)) {
+		if (ka->sa.sa_flags & SA_SIGINFO)
+			ret = ia32_setup_rt_frame(sig, ka, info, set, regs);
+		else
+			ret = ia32_setup_frame(sig, ka, set, regs);
+	} else
+#endif
+	ret = __setup_rt_frame(sig, ka, info, set, regs);
+
+	return ret;
+}
 
 static int
 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
@@ -317,14 +335,6 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 	    likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
 		regs->flags &= ~X86_EFLAGS_TF;
 
-#ifdef CONFIG_IA32_EMULATION
-	if (test_thread_flag(TIF_IA32)) {
-		if (ka->sa.sa_flags & SA_SIGINFO)
-			ret = ia32_setup_rt_frame(sig, ka, info, oldset, regs);
-		else
-			ret = ia32_setup_frame(sig, ka, oldset, regs);
-	} else
-#endif
 	ret = setup_rt_frame(sig, ka, info, oldset, regs);
 
 	if (ret == 0) {