diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/llist.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/llist.h b/include/linux/llist.h index ca91875286b..27bbdf5ddf8 100644 --- a/include/linux/llist.h +++ b/include/linux/llist.h | |||
@@ -142,8 +142,10 @@ static inline bool llist_empty(const struct llist_head *head) | |||
142 | * llist_add - add a new entry | 142 | * llist_add - add a new entry |
143 | * @new: new entry to be added | 143 | * @new: new entry to be added |
144 | * @head: the head for your lock-less list | 144 | * @head: the head for your lock-less list |
145 | * | ||
146 | * Return whether list is empty before adding. | ||
145 | */ | 147 | */ |
146 | static inline void llist_add(struct llist_node *new, struct llist_head *head) | 148 | static inline bool llist_add(struct llist_node *new, struct llist_head *head) |
147 | { | 149 | { |
148 | struct llist_node *entry, *old_entry; | 150 | struct llist_node *entry, *old_entry; |
149 | 151 | ||
@@ -156,6 +158,8 @@ static inline void llist_add(struct llist_node *new, struct llist_head *head) | |||
156 | break; | 158 | break; |
157 | cpu_relax(); | 159 | cpu_relax(); |
158 | } | 160 | } |
161 | |||
162 | return old_entry == NULL; | ||
159 | } | 163 | } |
160 | 164 | ||
161 | /** | 165 | /** |