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-rw-r--r--ANDROID_3.4.5/include/linux/rculist_nulls.h116
1 files changed, 0 insertions, 116 deletions
diff --git a/ANDROID_3.4.5/include/linux/rculist_nulls.h b/ANDROID_3.4.5/include/linux/rculist_nulls.h
deleted file mode 100644
index 2ae13714..00000000
--- a/ANDROID_3.4.5/include/linux/rculist_nulls.h
+++ /dev/null
@@ -1,116 +0,0 @@
-#ifndef _LINUX_RCULIST_NULLS_H
-#define _LINUX_RCULIST_NULLS_H
-
-#ifdef __KERNEL__
-
-/*
- * RCU-protected list version
- */
-#include <linux/list_nulls.h>
-#include <linux/rcupdate.h>
-
-/**
- * hlist_nulls_del_init_rcu - deletes entry from hash list with re-initialization
- * @n: the element to delete from the hash list.
- *
- * Note: hlist_nulls_unhashed() on the node return true after this. It is
- * useful for RCU based read lockfree traversal if the writer side
- * must know if the list entry is still hashed or already unhashed.
- *
- * In particular, it means that we can not poison the forward pointers
- * that may still be used for walking the hash list and we can only
- * zero the pprev pointer so list_unhashed() will return true after
- * this.
- *
- * The caller must take whatever precautions are necessary (such as
- * holding appropriate locks) to avoid racing with another
- * list-mutation primitive, such as hlist_nulls_add_head_rcu() or
- * hlist_nulls_del_rcu(), running on this same list. However, it is
- * perfectly legal to run concurrently with the _rcu list-traversal
- * primitives, such as hlist_nulls_for_each_entry_rcu().
- */
-static inline void hlist_nulls_del_init_rcu(struct hlist_nulls_node *n)
-{
- if (!hlist_nulls_unhashed(n)) {
- __hlist_nulls_del(n);
- n->pprev = NULL;
- }
-}
-
-#define hlist_nulls_first_rcu(head) \
- (*((struct hlist_nulls_node __rcu __force **)&(head)->first))
-
-#define hlist_nulls_next_rcu(node) \
- (*((struct hlist_nulls_node __rcu __force **)&(node)->next))
-
-/**
- * hlist_nulls_del_rcu - deletes entry from hash list without re-initialization
- * @n: the element to delete from the hash list.
- *
- * Note: hlist_nulls_unhashed() on entry does not return true after this,
- * the entry is in an undefined state. It is useful for RCU based
- * lockfree traversal.
- *
- * In particular, it means that we can not poison the forward
- * pointers that may still be used for walking the hash list.
- *
- * The caller must take whatever precautions are necessary
- * (such as holding appropriate locks) to avoid racing
- * with another list-mutation primitive, such as hlist_nulls_add_head_rcu()
- * or hlist_nulls_del_rcu(), running on this same list.
- * However, it is perfectly legal to run concurrently with
- * the _rcu list-traversal primitives, such as
- * hlist_nulls_for_each_entry().
- */
-static inline void hlist_nulls_del_rcu(struct hlist_nulls_node *n)
-{
- __hlist_nulls_del(n);
- n->pprev = LIST_POISON2;
-}
-
-/**
- * hlist_nulls_add_head_rcu
- * @n: the element to add to the hash list.
- * @h: the list to add to.
- *
- * Description:
- * Adds the specified element to the specified hlist_nulls,
- * while permitting racing traversals.
- *
- * The caller must take whatever precautions are necessary
- * (such as holding appropriate locks) to avoid racing
- * with another list-mutation primitive, such as hlist_nulls_add_head_rcu()
- * or hlist_nulls_del_rcu(), running on this same list.
- * However, it is perfectly legal to run concurrently with
- * the _rcu list-traversal primitives, such as
- * hlist_nulls_for_each_entry_rcu(), used to prevent memory-consistency
- * problems on Alpha CPUs. Regardless of the type of CPU, the
- * list-traversal primitive must be guarded by rcu_read_lock().
- */
-static inline void hlist_nulls_add_head_rcu(struct hlist_nulls_node *n,
- struct hlist_nulls_head *h)
-{
- struct hlist_nulls_node *first = h->first;
-
- n->next = first;
- n->pprev = &h->first;
- rcu_assign_pointer(hlist_nulls_first_rcu(h), n);
- if (!is_a_nulls(first))
- first->pprev = &n->next;
-}
-/**
- * hlist_nulls_for_each_entry_rcu - iterate over rcu list of given type
- * @tpos: the type * to use as a loop cursor.
- * @pos: the &struct hlist_nulls_node to use as a loop cursor.
- * @head: the head for your list.
- * @member: the name of the hlist_nulls_node within the struct.
- *
- */
-#define hlist_nulls_for_each_entry_rcu(tpos, pos, head, member) \
- for (pos = rcu_dereference_raw(hlist_nulls_first_rcu(head)); \
- (!is_a_nulls(pos)) && \
- ({ tpos = hlist_nulls_entry(pos, typeof(*tpos), member); 1; }); \
- pos = rcu_dereference_raw(hlist_nulls_next_rcu(pos)))
-
-#endif
-#endif