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| author | Ming Lei <ming.lei@redhat.com> | 2024-10-25 02:37:18 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-10-26 15:14:53 +0200 |
| commit | 8acdd0e7bfadda6b5103f2960d293581954454ed (patch) | |
| tree | b21831a9052813512e445867a919d5d9735e24b0 /block/blk-mq.c | |
| parent | blk-mq: Unexport blk_mq_flush_busy_ctxs() (diff) | |
| download | linux-8acdd0e7bfadda6b5103f2960d293581954454ed.tar.xz linux-8acdd0e7bfadda6b5103f2960d293581954454ed.zip | |
blk-mq: add non_owner variant of start_freeze/unfreeze queue APIs
Add non_owner variant of start_freeze/unfreeze queue APIs, so that the
caller knows that what they are doing, and we can skip lockdep support
for non_owner variant in per-call level.
Prepare for supporting lockdep for freezing/unfreezing queue.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20241025003722.3630252-2-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index aae9a112c913..770276815507 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -197,6 +197,26 @@ void blk_mq_unfreeze_queue(struct request_queue *q) EXPORT_SYMBOL_GPL(blk_mq_unfreeze_queue); /* + * non_owner variant of blk_freeze_queue_start + * + * Unlike blk_freeze_queue_start, the queue doesn't need to be unfrozen + * by the same task. This is fragile and should not be used if at all + * possible. + */ +void blk_freeze_queue_start_non_owner(struct request_queue *q) +{ + blk_freeze_queue_start(q); +} +EXPORT_SYMBOL_GPL(blk_freeze_queue_start_non_owner); + +/* non_owner variant of blk_mq_unfreeze_queue */ +void blk_mq_unfreeze_queue_non_owner(struct request_queue *q) +{ + __blk_mq_unfreeze_queue(q, false); +} +EXPORT_SYMBOL_GPL(blk_mq_unfreeze_queue_non_owner); + +/* * FIXME: replace the scsi_internal_device_*block_nowait() calls in the * mpt3sas driver such that this function can be removed. */ |