nios2: fix unhandled signals

Follow other architectures for user fault handling.
Signed-off-by: NChung-Ling Tang <cltang@codesourcery.com>
Acked-by: NLey Foon Tan <lftan@altera.com>

arch/nios2/mm/fault.c

@@ -159,9 +159,11 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long cause,
 bad_area_nosemaphore:
 	/* User mode accesses just cause a SIGSEGV */
 	if (user_mode(regs)) {
-		pr_alert("%s: unhandled page fault (%d) at 0x%08lx, "
-			"cause %ld\n", current->comm, SIGSEGV, address, cause);
-		show_regs(regs);
+		if (unhandled_signal(current, SIGSEGV) && printk_ratelimit()) {
+			pr_info("%s: unhandled page fault (%d) at 0x%08lx, "
+				"cause %ld\n", current->comm, SIGSEGV, address, cause);
+			show_regs(regs);
+		}
 		_exception(SIGSEGV, regs, code, address);
 		return;
 	}