NAME
blk_queue_issue_flush_fn - set function for issuing a flush
SYNOPSIS
void blk_queue_issue_flush_fn (request_queue_t * q,
issue_flush_fn * iff);
ARGUMENTS
q the request queue
iff the function to be called issuing the flush
DESCRIPTION
If a driver supports issuing a flush command, the support is notified
to the block layer by defining it through this call.