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author | Christoph Hellwig <hch@lst.de> | 2020-03-27 09:30:11 +0100 |
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committer | Jens Axboe <axboe@kernel.dk> | 2020-03-27 10:23:43 -0600 |
commit | 3d745ea5b095a3985129e162900b7e6c22518a9d (patch) | |
tree | 38a7c6995ddf6e14ae5b7a2bc013590af4ce5f9d /block/blk-settings.c | |
parent | ff27668ce8092c74965f21b5c02ebc6b6764db95 (diff) | |
download | linux-stable-3d745ea5b095a3985129e162900b7e6c22518a9d.tar.gz linux-stable-3d745ea5b095a3985129e162900b7e6c22518a9d.tar.bz2 linux-stable-3d745ea5b095a3985129e162900b7e6c22518a9d.zip |
block: simplify queue allocation
Current make_request based drivers use either blk_alloc_queue_node or
blk_alloc_queue to allocate a queue, and then set up the make_request_fn
function pointer and a few parameters using the blk_queue_make_request
helper. Simplify this by passing the make_request pointer to
blk_alloc_queue, and while at it merge the _node variant into the main
helper by always passing a node_id, and remove the superfluous gfp_mask
parameter. A lower-level __blk_alloc_queue is kept for the blk-mq case.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-settings.c')
-rw-r--r-- | block/blk-settings.c | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index c8eda2e7b91e..126d216a2db6 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -87,42 +87,6 @@ void blk_set_stacking_limits(struct queue_limits *lim) EXPORT_SYMBOL(blk_set_stacking_limits); /** - * blk_queue_make_request - define an alternate make_request function for a device - * @q: the request queue for the device to be affected - * @mfn: the alternate make_request function - * - * Description: - * The normal way for &struct bios to be passed to a device - * driver is for them to be collected into requests on a request - * queue, and then to allow the device driver to select requests - * off that queue when it is ready. This works well for many block - * devices. However some block devices (typically virtual devices - * such as md or lvm) do not benefit from the processing on the - * request queue, and are served best by having the requests passed - * directly to them. This can be achieved by providing a function - * to blk_queue_make_request(). - * - * Caveat: - * The driver that does this *must* be able to deal appropriately - * with buffers in "highmemory". This can be accomplished by either calling - * kmap_atomic() to get a temporary kernel mapping, or by calling - * blk_queue_bounce() to create a buffer in normal memory. - **/ -void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn) -{ - /* - * set defaults - */ - q->nr_requests = BLKDEV_MAX_RQ; - - q->make_request_fn = mfn; - blk_queue_dma_alignment(q, 511); - - blk_set_default_limits(&q->limits); -} -EXPORT_SYMBOL(blk_queue_make_request); - -/** * blk_queue_bounce_limit - set bounce buffer limit for queue * @q: the request queue for the device * @max_addr: the maximum address the device can handle |