diff options
author | Grant Likely <grant.likely@secretlab.ca> | 2010-07-24 19:49:13 +0400 |
---|---|---|
committer | Grant Likely <grant.likely@secretlab.ca> | 2010-07-24 19:49:13 +0400 |
commit | 4e4f62bf7396fca48efe61513640ee399a6046e3 (patch) | |
tree | 42a503af02d9806bcc05e5fcc2cd53f9bd45b0c2 /include/linux/list.h | |
parent | 9e3288dc9a94fab5ea87db42177d3a9e0345a614 (diff) | |
parent | b37fa16e78d6f9790462b3181602a26b5af36260 (diff) | |
download | linux-4e4f62bf7396fca48efe61513640ee399a6046e3.tar.xz |
Merge commit 'v2.6.35-rc6' into devicetree/next
Conflicts:
arch/sparc/kernel/prom_64.c
Diffstat (limited to 'include/linux/list.h')
-rw-r--r-- | include/linux/list.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/list.h b/include/linux/list.h index 8392884a2977..5d57a3a1fa1b 100644 --- a/include/linux/list.h +++ b/include/linux/list.h @@ -544,6 +544,21 @@ static inline void list_splice_tail_init(struct list_head *list, &pos->member != (head); \ pos = n, n = list_entry(n->member.prev, typeof(*n), member)) +/** + * list_safe_reset_next - reset a stale list_for_each_entry_safe loop + * @pos: the loop cursor used in the list_for_each_entry_safe loop + * @n: temporary storage used in list_for_each_entry_safe + * @member: the name of the list_struct within the struct. + * + * list_safe_reset_next is not safe to use in general if the list may be + * modified concurrently (eg. the lock is dropped in the loop body). An + * exception to this is if the cursor element (pos) is pinned in the list, + * and list_safe_reset_next is called after re-taking the lock and before + * completing the current iteration of the loop body. + */ +#define list_safe_reset_next(pos, n, member) \ + n = list_entry(pos->member.next, typeof(*pos), member) + /* * Double linked lists with a single pointer list head. * Mostly useful for hash tables where the two pointer list head is |