--- linux-2.6.16.20/arch/sh/kernel/signal.c_orig	2006-06-08 23:52:12.000000000 +0000
+++ linux-2.6.16.20/arch/sh/kernel/signal.c	2006-06-08 23:58:27.000000000 +0000
@@ -33,7 +33,7 @@
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
+asmlinkage int do_signal(volatile struct pt_regs *regs, sigset_t *oldset);
 
 /*
  * Atomically swap in the new signal mask, and wait for a signal.
@@ -41,7 +41,7 @@
 asmlinkage int
 sys_sigsuspend(old_sigset_t mask,
 	       unsigned long r5, unsigned long r6, unsigned long r7,
-	       struct pt_regs regs)
+	       volatile struct pt_regs regs)
 {
 	sigset_t saveset;
 
@@ -64,7 +64,7 @@
 asmlinkage int
 sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize,
 		  unsigned long r6, unsigned long r7,
-		  struct pt_regs regs)
+		  volatile struct pt_regs regs)
 {
 	sigset_t saveset, newset;
 
@@ -92,7 +92,7 @@
 
 asmlinkage int 
 sys_sigaction(int sig, const struct old_sigaction __user *act,
-	      struct old_sigaction __user *oact)
+	      volatile struct old_sigaction __user *oact)
 {
 	struct k_sigaction new_ka, old_ka;
 	int ret;
@@ -125,7 +125,7 @@
 asmlinkage int
 sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
 		unsigned long r6, unsigned long r7,
-		struct pt_regs regs)
+		volatile struct pt_regs regs)
 {
 	return do_sigaltstack(uss, uoss, regs.regs[15]);
 }
@@ -232,7 +232,7 @@
 
 asmlinkage int sys_sigreturn(unsigned long r4, unsigned long r5,
 			     unsigned long r6, unsigned long r7,
-			     struct pt_regs regs)
+			     volatile struct pt_regs regs)
 {
 	struct sigframe __user *frame = (struct sigframe __user *)regs.regs[15];
 	sigset_t set;
@@ -265,7 +265,7 @@
 
 asmlinkage int sys_rt_sigreturn(unsigned long r4, unsigned long r5,
 				unsigned long r6, unsigned long r7,
-				struct pt_regs regs)
+				volatile struct pt_regs regs)
 {
 	struct rt_sigframe __user *frame = (struct rt_sigframe __user *)regs.regs[15];
 	sigset_t set;