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block: fix the kerneldoc comment for __register_blkdev 

Switch the comment to talk about __register_blkdev instead of
register_blkdev and document the new probe parameter.

Fixes: 3da1a61e7046 ("block: add an optional probe callback to major_names")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-11-14 18:08:21 +01:00 committed by Jens Axboe
parent e418de3abc
commit e2b6b30187
1 changed files with 4 additions and 1 deletions
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5
block/genhd.c
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@ -418,11 +418,12 @@ void blkdev_show(struct seq_file *seqf, off_t offset)
#endif /* CONFIG_PROC_FS */
/**
* register_blkdev - register a new block device
* __register_blkdev - register a new block device
*
* @major: the requested major device number [1..BLKDEV_MAJOR_MAX-1]. If
* @major = 0, try to allocate any unused major number.
* @name: the name of the new block device as a zero terminated string
* @probe: allback that is called on access to any minor number of @major
*
* The @name must be unique within the system.
*
@ -436,6 +437,8 @@ void blkdev_show(struct seq_file *seqf, off_t offset)
*
* See Documentation/admin-guide/devices.txt for the list of allocated
* major numbers.
*
* Use register_blkdev instead for any new code.
*/
int __register_blkdev(unsigned int major, const char *name,
void (*probe)(dev_t devt))