1 /* Public domain. */ 2 3 #ifndef LINUX_RCUPDATE_H 4 #define LINUX_RCUPDATE_H 5 6 #include <linux/cpumask.h> 7 8 struct rcu_head { 9 }; 10 11 #define __rcu 12 #define rcu_dereference(p) (p) 13 #define rcu_dereference_raw(p) (p) 14 #define rcu_dereference_protected(p, c) (p) 15 #define rcu_access_pointer(p) (p) 16 #define RCU_INIT_POINTER(p, v) do { (p) = (v); } while(0) 17 #define rcu_assign_pointer(p, v) do { (p) = (v); } while(0) 18 #define rcu_read_lock() 19 #define rcu_read_unlock() 20 #define rcu_pointer_handoff(p) (p) 21 #define init_rcu_head(h) 22 #define destroy_rcu_head(h) 23 24 #define rcu_replace_pointer(rp, p, c) \ 25 ({ \ 26 __typeof(rp) __r = rp; \ 27 rp = p; \ 28 __r; \ 29 }) 30 31 #define kfree_rcu(objp, name) do { free((void *)objp, M_DRM, 0); } while(0) 32 33 #define rcu_barrier() __asm __volatile("" : : : "memory") 34 35 typedef void (*rcu_callback_t)(struct rcu_head *head); 36 37 static inline void 38 call_rcu(struct rcu_head *head, void (*fn)(struct rcu_head *)) 39 { 40 fn(head); 41 } 42 43 #define synchronize_rcu() 44 #define synchronize_rcu_expedited() 45 #define cond_synchronize_rcu(x) 46 #define get_state_synchronize_rcu() 0 47 48 #endif 49