ARC: mm: do_page_fault refactor #6: error handlers to use same pattern

 - up_read
 - if !user_mode
 - whatever error handling
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/mm/fault.c

@@ -191,22 +191,21 @@ void do_page_fault(unsigned long address, struct pt_regs *regs)
 bad_area:
 	up_read(&mm->mmap_sem);
 
-	/* User mode accesses just cause a SIGSEGV */
-	if (user_mode(regs)) {
+	if (!user_mode(regs))
+		goto no_context;
+
 	tsk->thread.fault_address = address;
 	force_sig_fault(SIGSEGV, si_code, (void __user *)address, tsk);
 	return;
-	}
 
 out_of_memory:
 	up_read(&mm->mmap_sem);
 
-	if (user_mode(regs)) {
+	if (!user_mode(regs))
+		goto no_context;
+
 	pagefault_out_of_memory();
 	return;
-	}
-
-	goto no_context;
 
 do_sigbus:
 	up_read(&mm->mmap_sem);