blob: d6d9262bb64db89d34ecaf9761fb9f9be3bad73e [file] [log] [blame]
#ifndef __BACKPORT_LINUX_RCUPDATE_H
#define __BACKPORT_LINUX_RCUPDATE_H
#include_next <linux/rcupdate.h>
/*
* This adds a nested function everywhere kfree_rcu() was called. This
* function frees the memory and is given as a function to call_rcu().
* The rcu callback could happen every time also after the module was
* unloaded and this will cause problems. To address that problem, we
* put rcu_barrier() into each module_exit() in module.h.
*/
#if !defined(kfree_rcu)
#define kfree_rcu(data, rcuhead) do { \
void __kfree_rcu_fn(struct rcu_head *rcu_head) \
{ \
void *___ptr; \
___ptr = container_of(rcu_head, typeof(*(data)), rcuhead);\
kfree(___ptr); \
} \
call_rcu(&(data)->rcuhead, __kfree_rcu_fn); \
} while (0)
#endif
#ifndef RCU_INIT_POINTER
#define RCU_INIT_POINTER(p, v) \
p = (typeof(*v) __force __rcu *)(v)
#endif
#ifndef rcu_dereference_check
#define rcu_dereference_check(p, c) rcu_dereference(p)
#endif
#ifndef rcu_dereference_protected
#define rcu_dereference_protected(p, c) (p)
#endif
#ifndef rcu_access_pointer
#define rcu_access_pointer(p) ACCESS_ONCE(p)
#endif
#ifndef rcu_dereference_raw
#define rcu_dereference_raw(p) rcu_dereference(p)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,34)
static inline int rcu_read_lock_held(void)
{
return 1;
}
#endif
#endif /* __BACKPORT_LINUX_RCUPDATE_H */