x86: signal: introduce do_rt_sigreturn()

introduce do_rt_sigreturn(), to collect common part of sys_rt_sigreturn().

No change in functionality intended.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 17 insertions, 6 deletions

diff --git a/arch/x86/kernel/signal_32.c b/arch/x86/kernel/signal_32.c
index d433861a6599..da3cf3270f83 100644
--- a/arch/x86/kernel/signal_32.c
+++ b/arch/x86/kernel/signal_32.c
@@ -215,9 +215,8 @@ badframe:
         return 0;
 }
 
-asmlinkage int sys_rt_sigreturn(unsigned long __unused)
+static long do_rt_sigreturn(struct pt_regs *regs)
 {
-        struct pt_regs *regs = (struct pt_regs *)&__unused;
         struct rt_sigframe __user *frame;
         unsigned long ax;
         sigset_t set;
@@ -243,10 +242,17 @@ asmlinkage int sys_rt_sigreturn(unsigned long __unused)
         return ax;
 
 badframe:
-        signal_fault(regs, frame, "rt sigreturn");
+        signal_fault(regs, frame, "rt_sigreturn");
         return 0;
 }
 
+asmlinkage int sys_rt_sigreturn(unsigned long __unused)
+{
+        struct pt_regs *regs = (struct pt_regs *)&__unused;
+
+        return do_rt_sigreturn(regs);
+}
+
 /*
  * Set up a signal frame.
  */
diff --git a/arch/x86/kernel/signal_64.c b/arch/x86/kernel/signal_64.c
index a21c85197295..bf77d4789a2d 100644
--- a/arch/x86/kernel/signal_64.c
+++ b/arch/x86/kernel/signal_64.c
@@ -104,11 +104,11 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
         return err;
 }
 
-asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
+static long do_rt_sigreturn(struct pt_regs *regs)
 {
         struct rt_sigframe __user *frame;
-        sigset_t set;
         unsigned long ax;
+        sigset_t set;
 
         frame = (struct rt_sigframe __user *)(regs->sp - sizeof(long));
         if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
@@ -131,10 +131,15 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
         return ax;
 
 badframe:
-        signal_fault(regs, frame, "sigreturn");
+        signal_fault(regs, frame, "rt_sigreturn");
         return 0;
 }
 
+asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
+{
+        return do_rt_sigreturn(regs);
+}
+
 /*
  * Set up a signal frame.
  */