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