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| author |   Jens Axboe <axboe@kernel.dk> | 2018-11-08 11:09:50 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-08 11:09:50 -0700 |
| commit | ab11fe5af1049598d1ff73014f3ea65663246a6e (patch) | |
| tree | f774e0bcc38db1ea8e9b45918a142c260df24934 /block/blk-mq-tag.c | |
| parent | blk-mq: provide a helper to check if a queue is busy (diff) | |
| download | wireguard-linux-ab11fe5af1049598d1ff73014f3ea65663246a6e.tar.xz wireguard-linux-ab11fe5af1049598d1ff73014f3ea65663246a6e.zip | |
blk-mq-tag: document tag iteration helper return value
Document the fact that the strategy function passed in can
control whether to continue iterating or not.
Suggested-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq-tag.c')
| -rw-r--r-- | block/blk-mq-tag.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index 097e9a67d5f5..87bc5df72d48 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -248,7 +248,8 @@ static bool bt_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data) * @fn: Pointer to the function that will be called for each request * associated with @hctx that has been assigned a driver tag. * @fn will be called as follows: @fn(@hctx, rq, @data, @reserved) - * where rq is a pointer to a request. + * where rq is a pointer to a request. Return true to continue + * iterating tags, false to stop. * @data: Will be passed as third argument to @fn. * @reserved: Indicates whether @bt is the breserved_tags member or the * bitmap_tags member of struct blk_mq_tags. @@ -301,7 +302,8 @@ static bool bt_tags_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data) * or the bitmap_tags member of struct blk_mq_tags. * @fn: Pointer to the function that will be called for each started * request. @fn will be called as follows: @fn(rq, @data, - * @reserved) where rq is a pointer to a request. + * @reserved) where rq is a pointer to a request. Return true + * to continue iterating tags, false to stop. * @data: Will be passed as second argument to @fn. * @reserved: Indicates whether @bt is the breserved_tags member or the * bitmap_tags member of struct blk_mq_tags. @@ -326,7 +328,8 @@ static void bt_tags_for_each(struct blk_mq_tags *tags, struct sbitmap_queue *bt, * @fn: Pointer to the function that will be called for each started * request. @fn will be called as follows: @fn(rq, @priv, * reserved) where rq is a pointer to a request. 'reserved' - * indicates whether or not @rq is a reserved request. + * indicates whether or not @rq is a reserved request. Return + * true to continue iterating tags, false to stop. * @priv: Will be passed as second argument to @fn. */ static void blk_mq_all_tag_busy_iter(struct blk_mq_tags *tags, @@ -343,7 +346,8 @@ static void blk_mq_all_tag_busy_iter(struct blk_mq_tags *tags, * @fn: Pointer to the function that will be called for each started * request. @fn will be called as follows: @fn(rq, @priv, * reserved) where rq is a pointer to a request. 'reserved' - * indicates whether or not @rq is a reserved request. + * indicates whether or not @rq is a reserved request. Return + * true to continue iterating tags, false to stop. * @priv: Will be passed as second argument to @fn. */ void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, |