* use is to mediate communication between process-level code and irq/NMI
* handlers, all running on the same CPU.
*/
-#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&x)
+#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
#ifndef max
#define max(a,b) ((a)>(b)?(a):(b))