diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-05-21 08:50:55 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-06-01 16:42:23 +0300 |
| commit | f525464a8000f092c20b00eead3eaa9d849c599e (patch) | |
| tree | 6a05793a03d8cf7c52635e886f73203633329cbe /include/linux/genhd.h | |
| parent | 958229a7c55f219b1cff99f939dabbc1b6ba7161 (diff) | |
| download | linux-f525464a8000f092c20b00eead3eaa9d849c599e.tar.xz | |
block: add blk_alloc_disk and blk_cleanup_disk APIs
Add two new APIs to allocate and free a gendisk including the
request_queue for use with BIO based drivers. This is to avoid
boilerplate code in drivers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210521055116.1053587-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/genhd.h')
| -rw-r--r-- | include/linux/genhd.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 4d3ee8b6b297..782f0171d104 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -278,6 +278,28 @@ extern void put_disk(struct gendisk *disk); #define alloc_disk(minors) alloc_disk_node(minors, NUMA_NO_NODE) +/** + * blk_alloc_disk - allocate a gendisk structure + * @node_id: numa node to allocate on + * + * Allocate and pre-initialize a gendisk structure for use with BIO based + * drivers. + * + * Context: can sleep + */ +#define blk_alloc_disk(node_id) \ +({ \ + struct gendisk *__disk = __blk_alloc_disk(node_id); \ + static struct lock_class_key __key; \ + \ + if (__disk) \ + lockdep_init_map(&__disk->lockdep_map, \ + "(bio completion)", &__key, 0); \ + __disk; \ +}) +struct gendisk *__blk_alloc_disk(int node); +void blk_cleanup_disk(struct gendisk *disk); + int __register_blkdev(unsigned int major, const char *name, void (*probe)(dev_t devt)); #define register_blkdev(major, name) \ |