blkdev_get_by_dev - open a block device by device number
2. SYNOPSIS ▲
struct block_device * blkdev_get_by_dev(dev_t dev , fmode_t mode , void * holder );
3. ARGUMENTS ▲
device number of block device to open
exclusive holder identifier
4. 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.
5. CONTEXT ▲
6. RETURNS ▲
Pointer to block_device on success, ERR_PTR(-errno) on failure.
7. COPYRIGHT ▲