alpha: don't pass useless arguments to do_{,rt_},sigreturn()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 8 insertions, 8 deletions

diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index 32575f85507d..336393c9c11f 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -160,10 +160,10 @@ extern char compile_time_assert
 #define INSN_CALLSYS            0x00000083
 
 static long
-restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
-                   struct switch_stack *sw)
+restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
 {
         unsigned long usp;
+        struct switch_stack *sw = (struct switch_stack *)regs - 1;
         long i, err = __get_user(regs->pc, &sc->sc_pc);
 
         current_thread_info()->restart_block.fn = do_no_restart_syscall;
@@ -215,9 +215,9 @@ restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
    registers and transfer control from userland.  */
 
 asmlinkage void
-do_sigreturn(struct sigcontext __user *sc, struct pt_regs *regs,
-             struct switch_stack *sw)
+do_sigreturn(struct sigcontext __user *sc)
 {
+        struct pt_regs *regs = current_pt_regs();
         sigset_t set;
 
         /* Verify that it's a good sigcontext before using it */
@@ -228,7 +228,7 @@ do_sigreturn(struct sigcontext __user *sc, struct pt_regs *regs,
 
         set_current_blocked(&set);
 
-        if (restore_sigcontext(sc, regs, sw))
+        if (restore_sigcontext(sc, regs))
                 goto give_sigsegv;
 
         /* Send SIGTRAP if we're single-stepping: */
@@ -249,9 +249,9 @@ give_sigsegv:
 }
 
 asmlinkage void
-do_rt_sigreturn(struct rt_sigframe __user *frame, struct pt_regs *regs,
-                struct switch_stack *sw)
+do_rt_sigreturn(struct rt_sigframe __user *frame)
 {
+        struct pt_regs *regs = current_pt_regs();
         sigset_t set;
 
         /* Verify that it's a good ucontext_t before using it */
@@ -262,7 +262,7 @@ do_rt_sigreturn(struct rt_sigframe __user *frame, struct pt_regs *regs,
 
         set_current_blocked(&set);
 
-        if (restore_sigcontext(&frame->uc.uc_mcontext, regs, sw))
+        if (restore_sigcontext(&frame->uc.uc_mcontext, regs))
                 goto give_sigsegv;
 
         /* Send SIGTRAP if we're single-stepping: */