mirror/libbpf
1
0
Fork 0
mirror of https://github.com/netdata/libbpf.git synced 2026-04-05 16:19:06 +08:00
Code Issues Packages Projects Releases Wiki Activity

include: implement list_empty() and list_for_each_entry()

Browse Source 
Implement list_empty() function and list_for_each_entry() macro, newly used by
xsk.c in 2f6324a3937f ("libbpf: Support shared umems between queues and devices")
(Linux commit sha).

Fixes: 5f630710f52e ("libbpf: Support shared umems between queues and devices")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
This commit is contained in:
Andrii Nakryiko
2020-09-03 20:22:42 -07:00
committed by Andrii Nakryiko
parent 6384ee1968
commit 91001a9923
1 changed files with 9 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/linux/list.h
View File

@@ -72,11 +72,20 @@ static inline void list_del(struct list_head *entry)
entry->prev = LIST_POISON2; entry->prev = LIST_POISON2;
} }
static inline int list_empty(const struct list_head *head)
{
return head->next == head;
}
#define list_entry(ptr, type, member) \ #define list_entry(ptr, type, member) \
container_of(ptr, type, member) container_of(ptr, type, member)
#define list_first_entry(ptr, type, member) \ #define list_first_entry(ptr, type, member) \
list_entry((ptr)->next, type, member) list_entry((ptr)->next, type, member)
#define list_next_entry(pos, member) \ #define list_next_entry(pos, member) \
list_entry((pos)->member.next, typeof(*(pos)), member) list_entry((pos)->member.next, typeof(*(pos)), member)
#define list_for_each_entry(pos, head, member) \
for (pos = list_first_entry(head, typeof(*pos), member); \
&pos->member != (head); \
pos = list_next_entry(pos, member))
#endif #endif