diff options
| -rw-r--r-- | drivers/base/sync.c | 5 | ||||
| -rw-r--r-- | include/linux/sync.h | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/base/sync.c b/drivers/base/sync.c index 4a8604b..ea0b664 100644 --- a/drivers/base/sync.c +++ b/drivers/base/sync.c @@ -155,12 +155,17 @@ void sync_pt_free(struct sync_pt *pt) /* call with pt->parent->active_list_lock held */ static int _sync_pt_has_signaled(struct sync_pt *pt) { + int old_status = pt->status; + if (!pt->status) pt->status = pt->parent->ops->has_signaled(pt); if (!pt->status && pt->parent->destroyed) pt->status = -ENOENT; + if (pt->status != old_status) + pt->timestamp = ktime_get(); + return pt->status; } diff --git a/include/linux/sync.h b/include/linux/sync.h index 388acd1..a8e289d 100644 --- a/include/linux/sync.h +++ b/include/linux/sync.h @@ -16,6 +16,7 @@ #include <linux/types.h> #ifdef __KERNEL__ +#include <linux/ktime.h> #include <linux/list.h> #include <linux/spinlock.h> #include <linux/wait.h> @@ -90,6 +91,8 @@ struct sync_timeline { * @fence: sync_fence to which the sync_pt belongs * @pt_list: membership in sync_fence.pt_list_head * @status: 1: signaled, 0:active, <0: error + * @timestamp: time which sync_pt status transitioned from active to + * singaled or error. */ struct sync_pt { struct sync_timeline *parent; @@ -102,6 +105,8 @@ struct sync_pt { /* protected by parent->active_list_lock */ int status; + + ktime_t timestamp; }; /** |