Add test_and_clear and test_and_set.
Showing the changes to include/linux/blkdev.h (1 of 2 files). Show all
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| @@ -428,6 +428,32 @@ static inline void queue_flag_set_unlocked(unsigned int flag, · 427 unmodified lines | ||
| 428 | 428 | __set_bit(flag, &q->queue_flags); |
| 429 | 429 | } |
| 430 | 430 | |
| 431 | +static inline int queue_flag_test_and_clear(unsigned int flag, | |
| 432 | + struct request_queue *q) | |
| 433 | +{ | |
| 434 | + WARN_ON_ONCE(!queue_is_locked(q)); | |
| 435 | + | |
| 436 | + if (test_bit(flag, &q->queue_flags)) { | |
| 437 | + __clear_bit(flag, &q->queue_flags); | |
| 438 | + return 1; | |
| 439 | + } | |
| 440 | + | |
| 441 | + return 0; | |
| 442 | +} | |
| 443 | + | |
| 444 | +static inline int queue_flag_test_and_set(unsigned int flag, | |
| 445 | + struct request_queue *q) | |
| 446 | +{ | |
| 447 | + WARN_ON_ONCE(!queue_is_locked(q)); | |
| 448 | + | |
| 449 | + if (!test_bit(flag, &q->queue_flags)) { | |
| 450 | + __set_bit(flag, &q->queue_flags); | |
| 451 | + return 0; | |
| 452 | + } | |
| 453 | + | |
| 454 | + return 1; | |
| 455 | +} | |
| 456 | + | |
| 431 | 457 | static inline void queue_flag_set(unsigned int flag, struct request_queue *q) |
| 432 | 458 | { |
| 433 | 459 | WARN_ON_ONCE(!queue_is_locked(q)); |