mm: Remove preempt count from pagefault disable/enable

Now that all users are cleaned up, we can remove the preemption count.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

mm/memory.c

@@ -2957,7 +2957,6 @@ unlock:
 
 void pagefault_disable(void)
 {
-	inc_preempt_count();
 	current->pagefault_disabled++;
 	/*
 	 * make sure to have issued the store before a pagefault
@@ -2975,12 +2974,6 @@ void pagefault_enable(void)
 	 */
 	barrier();
 	current->pagefault_disabled--;
-	dec_preempt_count();
-	/*
-	 * make sure we do..
-	 */
-	barrier();
-	preempt_check_resched();
 }
 EXPORT_SYMBOL(pagefault_enable);