arm: Prepare decoupling page-fault logic from preempt-count

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/arm/mm/fault.c

@@ -258,7 +258,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 	 * If we're in an interrupt or have no user
 	 * context, we must not take the fault..
 	 */
-	if (in_atomic() || !mm)
+	if (in_atomic() || !mm || current->pagefault_disabled)
 		goto no_context;
 
 	/*