c6x: Use sigsp()

Use sigsp() instead of the open coded variant.
Signed-off-by: Richard Weinberger <richard@nod.at>
Acked-by: Mark Salter <msalter@redhat.com>

arch/c6x/kernel/signal.c

@@ -127,17 +127,11 @@ static int setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
 	return err;
 }
 
-static inline void __user *get_sigframe(struct k_sigaction *ka,
+static inline void __user *get_sigframe(struct ksignal *ksig,
 					struct pt_regs *regs,
 					unsigned long framesize)
 {
-	unsigned long sp = regs->sp;
-
-	/*
-	 * This is the X/Open sanctioned signal stack switching.
-	 */
-	if ((ka->sa.sa_flags & SA_ONSTACK) && sas_ss_flags(sp) == 0)
-		sp = current->sas_ss_sp + current->sas_ss_size;
+	unsigned long sp = sigsp(regs->sp, ksig);
 
 	/*
 	 * No matter what happens, 'sp' must be dword
@@ -153,7 +147,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
 	unsigned long __user *retcode;
 	int err = 0;
 
-	frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
+	frame = get_sigframe(ksig, regs, sizeof(*frame));
 
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
 		return -EFAULT;