1 #ifndef __MMU_H
2 #define __MMU_H
3 
4 /*
5  * Type for a context number.  We declare it volatile to ensure proper ordering when it's
6  * accessed outside of spinlock'd critical sections (e.g., as done in activate_mm() and
7  * init_new_context()).
8  */
9 typedef volatile unsigned long mm_context_t;
10 
11 #endif
12