register_blkdev (9) Linux Manual Page
register_blkdev – register a new block device
Synopsis
int register_blkdev(unsigned int major, const char *name);Arguments
major
-
- the requested major device number [1..255]. If major=0, try to allocate any unused major number.
name
- the name of the new block device as a zero terminated string
Description
The name must be unique within the system.
The return value depends on the major input parameter. – if a major device number was requested in range [1..255] then the function returns zero on success, or a negative error code – if any unused major number was requested with major=0 parameter then the return value is the allocated major number in range [1..255] or a negative error code otherwise