[PATCH] Back out the initial work for atomic copy_*_user()

Back out the use of preempt_count to signify atomicity wrt pagefaults.
We won't do it that way - in_atomic() works fine.

include/linux/preempt.h

@@ -48,9 +48,6 @@ do { \
 	preempt_check_resched(); \
 } while (0)
 
-#define inc_preempt_count_non_preempt()	do { } while (0)
-#define dec_preempt_count_non_preempt()	do { } while (0)
-
 #else
 
 #define preempt_disable()		do { } while (0)
@@ -58,13 +55,6 @@ do { \
 #define preempt_enable()		do { } while (0)
 #define preempt_check_resched()		do { } while (0)
 
-/*
- * Sometimes we want to increment the preempt count, but we know that it's
- * already incremented if the kernel is compiled for preemptibility.
- */
-#define inc_preempt_count_non_preempt()	inc_preempt_count()
-#define dec_preempt_count_non_preempt()	dec_preempt_count()
-
 #endif
 
 #endif /* __LINUX_PREEMPT_H */