Name

blkdev_get_by_dev — open a block device by device number

Synopsis

struct block_device * blkdev_get_by_dev (dev_t dev,
 fmode_t mode,
 void * holder);
 

Arguments

dev_t dev

device number of block device to open

fmode_t mode

FMODE_* mask

void * holder

exclusive holder identifier

Description

Open the blockdevice described by device number dev. mode and holder are identical to blkdev_get.

Use it ONLY if you really do not have anything better - i.e. when you are behind a truly sucky interface and all you are given is a device number. _Never_ to be used for internal purposes. If you ever need it - reconsider your API.

On success, the returned block_device has reference count of one.

Context

Might sleep.

Return

Pointer to block_device on success, ERR_PTR(-errno) on failure.