| 77,7 → 77,7 |
|---|
| spinlock_t *lock; |
| unsigned context, seqno; |
| unsigned long flags; |
| // ktime_t timestamp; |
| ktime_t timestamp; |
| int status; |
| }; |
| |
| 280,6 → 280,22 |
|---|
| } |
| |
| /** |
| * fence_is_later - return if f1 is chronologically later than f2 |
| * @f1: [in] the first fence from the same context |
| * @f2: [in] the second fence from the same context |
| * |
| * Returns true if f1 is chronologically later than f2. Both fences must be |
| * from the same context, since a seqno is not re-used across contexts. |
| */ |
| static inline bool fence_is_later(struct fence *f1, struct fence *f2) |
| { |
| if (WARN_ON(f1->context != f2->context)) |
| return false; |
| |
| return f1->seqno - f2->seqno < INT_MAX; |
| } |
| |
| /** |
| * fence_later - return the chronologically later fence |
| * @f1: [in] the first fence from the same context |
| * @f2: [in] the second fence from the same context |
| 298,15 → 314,16 |
|---|
| * set if enable_signaling wasn't called, and enabling that here is |
| * overkill. |
| */ |
| if (f2->seqno - f1->seqno <= INT_MAX) |
| if (fence_is_later(f1, f2)) |
| return fence_is_signaled(f1) ? NULL : f1; |
| else |
| return fence_is_signaled(f2) ? NULL : f2; |
| else |
| return fence_is_signaled(f1) ? NULL : f1; |
| } |
| |
| signed long fence_wait_timeout(struct fence *, bool intr, signed long timeout); |
| signed long fence_wait_any_timeout(struct fence **fences, uint32_t count, |
| bool intr, signed long timeout); |
| |
| |
| /** |
| * fence_wait - sleep until the fence gets signaled |
| * @fence: [in] the fence to wait on |