Name
lookup_bdev — 
     lookup a struct block_device by name
 
Synopsis
| struct block_device * fsfunclookup_bdev ( | const char * pathname ); | 
 
Arguments
- pathname
- 
     special file representing the block device
     
Description
   Get a reference to the blockdevice at pathname in the current
   namespace if possible and return it.  Return ERR_PTR(error)
   otherwise.