diff options
| author | Sumit Singh <sumsingh@nvidia.com> | 2014-04-21 15:22:15 +0530 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2016-09-10 12:07:11 +0200 |
| commit | 456d57a4dffc3231b7fe10714189736cf53c3320 (patch) | |
| tree | 16c948ace7f397af5ff86a8cdc6ccbcf5c00acf4 | |
| parent | c1c7b649b4bc072415cca262c96a0d1181572fd5 (diff) | |
llist: defining relaxed version of llist_empty
Defining relaxed version of llist_empty as llist_empty_relaxed,
which will be used for power-optimization.
bug 1440421
Change-Id: I1c4c34b381e49775ed08ddd606d9744a7e7e1fba
Signed-off-by: Sumit Singh <sumsingh@nvidia.com>
Reviewed-on: http://git-master/r/426483
Reviewed-by: Sri Krishna Chowdary <schowdary@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alexander Van Brunt <avanbrunt@nvidia.com>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
| -rw-r--r-- | include/linux/llist.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/llist.h b/include/linux/llist.h index 97cf31da6..197228346 100644 --- a/include/linux/llist.h +++ b/include/linux/llist.h @@ -57,6 +57,7 @@ #include <linux/kernel.h> #include <asm/cmpxchg.h> +#include <asm/relaxed.h> struct llist_head { struct llist_node *first; @@ -160,6 +161,11 @@ static inline bool llist_empty(const struct llist_head *head) return ACCESS_ONCE(head->first) == NULL; } +static inline bool llist_empty_relaxed(const struct llist_head *head) +{ + return (void *)cpu_relaxed_read_long(&head->first) == NULL; +} + static inline struct llist_node *llist_next(struct llist_node *node) { return node->next; |