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- #include <linux/export.h>
- #include <linux/list.h>
- #include <linux/bug.h>
- #include <linux/kernel.h>
- #include <linux/rculist.h>
- void __list_add(struct list_head *new,
- struct list_head *prev,
- struct list_head *next)
- {
- WARN(next->prev != prev,
- "list_add corruption. next->prev should be "
- "prev (%p), but was %p. (next=%p).\n",
- prev, next->prev, next);
- WARN(prev->next != next,
- "list_add corruption. prev->next should be "
- "next (%p), but was %p. (prev=%p).\n",
- next, prev->next, prev);
- WARN(new == prev || new == next,
- "list_add double add: new=%p, prev=%p, next=%p.\n",
- new, prev, next);
- next->prev = new;
- new->next = next;
- new->prev = prev;
- WRITE_ONCE(prev->next, new);
- }
- EXPORT_SYMBOL(__list_add);
- void __list_del_entry(struct list_head *entry)
- {
- struct list_head *prev, *next;
- prev = entry->prev;
- next = entry->next;
- if (WARN(next == LIST_POISON1,
- "list_del corruption, %p->next is LIST_POISON1 (%p)\n",
- entry, LIST_POISON1) ||
- WARN(prev == LIST_POISON2,
- "list_del corruption, %p->prev is LIST_POISON2 (%p)\n",
- entry, LIST_POISON2) ||
- WARN(prev->next != entry,
- "list_del corruption. prev->next should be %p, "
- "but was %p\n", entry, prev->next) ||
- WARN(next->prev != entry,
- "list_del corruption. next->prev should be %p, "
- "but was %p\n", entry, next->prev))
- return;
- __list_del(prev, next);
- }
- EXPORT_SYMBOL(__list_del_entry);
- void list_del(struct list_head *entry)
- {
- __list_del_entry(entry);
- entry->next = LIST_POISON1;
- entry->prev = LIST_POISON2;
- }
- EXPORT_SYMBOL(list_del);
- void __list_add_rcu(struct list_head *new,
- struct list_head *prev, struct list_head *next)
- {
- WARN(next->prev != prev,
- "list_add_rcu corruption. next->prev should be prev (%p), but was %p. (next=%p).\n",
- prev, next->prev, next);
- WARN(prev->next != next,
- "list_add_rcu corruption. prev->next should be next (%p), but was %p. (prev=%p).\n",
- next, prev->next, prev);
- new->next = next;
- new->prev = prev;
- rcu_assign_pointer(list_next_rcu(prev), new);
- next->prev = new;
- }
- EXPORT_SYMBOL(__list_add_rcu);
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