diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-core.c | 30 | ||||
| -rw-r--r-- | block/blk-mq-debugfs.c | 1 |
2 files changed, 31 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 17eed16a6e04..edc276899116 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -349,6 +349,36 @@ void blk_sync_queue(struct request_queue *q) EXPORT_SYMBOL(blk_sync_queue); /** + * blk_set_preempt_only - set QUEUE_FLAG_PREEMPT_ONLY + * @q: request queue pointer + * + * Returns the previous value of the PREEMPT_ONLY flag - 0 if the flag was not + * set and 1 if the flag was already set. + */ +int blk_set_preempt_only(struct request_queue *q) +{ + unsigned long flags; + int res; + + spin_lock_irqsave(q->queue_lock, flags); + res = queue_flag_test_and_set(QUEUE_FLAG_PREEMPT_ONLY, q); + spin_unlock_irqrestore(q->queue_lock, flags); + + return res; +} +EXPORT_SYMBOL_GPL(blk_set_preempt_only); + +void blk_clear_preempt_only(struct request_queue *q) +{ + unsigned long flags; + + spin_lock_irqsave(q->queue_lock, flags); + queue_flag_clear(QUEUE_FLAG_PREEMPT_ONLY, q); + spin_unlock_irqrestore(q->queue_lock, flags); +} +EXPORT_SYMBOL_GPL(blk_clear_preempt_only); + +/** * __blk_run_queue_uncond - run a queue whether or not it has been stopped * @q: The queue to run * diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index bb7f08415203..e4f2bb936e66 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -74,6 +74,7 @@ static const char *const blk_queue_flag_name[] = { QUEUE_FLAG_NAME(REGISTERED), QUEUE_FLAG_NAME(SCSI_PASSTHROUGH), QUEUE_FLAG_NAME(QUIESCED), + QUEUE_FLAG_NAME(PREEMPT_ONLY), }; #undef QUEUE_FLAG_NAME |