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Implement more list header file functions.

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Add definition guard for the list_head structure.

Obtained from:	kmacy @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2016-12-26 10:41:51 +00:00
parent 0077de5654
commit a11bac7379
1 changed files with 29 additions and 2 deletions
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31
sys/compat/linuxkpi/common/include/linux/list.h
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@ -72,10 +72,18 @@
#define prefetch(x)
#define LINUX_LIST_HEAD_INIT(name) { &(name), &(name) }
#define LINUX_LIST_HEAD(name) \
struct list_head name = LINUX_LIST_HEAD_INIT(name)
#ifndef LIST_HEAD_DEF
#define LIST_HEAD_DEF
struct list_head {
struct list_head *next;
struct list_head *prev;
};
#endif
static inline void
INIT_LIST_HEAD(struct list_head *list)
@ -91,12 +99,26 @@ list_empty(const struct list_head *head)
return (head->next == head);
}
static inline int
list_empty_careful(const struct list_head *head)
{
struct list_head *next = head->next;
return ((next == head) && (next == head->prev));
}
static inline void
__list_del(struct list_head *prev, struct list_head *next)
{
next->prev = prev;
WRITE_ONCE(prev->next, next);
}
static inline void
list_del(struct list_head *entry)
{
entry->next->prev = entry->prev;
entry->prev->next = entry->next;
__list_del(entry->prev, entry->next);
}
static inline void
@ -183,6 +205,11 @@ list_del_init(struct list_head *entry)
for (p = list_entry((h)->prev, typeof(*p), field); &(p)->field != (h); \
p = list_entry((p)->field.prev, typeof(*p), field))
#define list_for_each_entry_safe_reverse(p, n, h, field) \
for (p = list_entry((h)->prev, typeof(*p), field), \
n = list_entry((p)->field.prev, typeof(*p), field); &(p)->field != (h); \
p = n, n = list_entry(n->field.prev, typeof(*n), field))
#define list_for_each_entry_continue_reverse(p, h, field) \
for (p = list_entry((p)->field.prev, typeof(*p), field); &(p)->field != (h); \
p = list_entry((p)->field.prev, typeof(*p), field))