Name
inode_dio_wait — 
     wait for outstanding DIO requests to finish
 
Synopsis
| void inode_dio_wait ( | struct inode * inode ); | 
 
Description
   Waits for all pending direct I/O requests to finish so that we can
   proceed with a truncate or equivalent operation.
   
   Must be called under a lock that serializes taking new references
   to i_dio_count, usually by inode->i_mutex.