int process_that_request_first (struct request * req, unsigned int nr_sectors);
May be used for processing bio's while submitting I/O without signalling completion. Fails if more data is requested than is available in the request in which case it doesn't advance any pointers.
Assumes a request is correctly set up. No sanity checks.
0 - no more data left to submit (not processed) 1 - data available to submit for this request (processed)
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This documentation was generated with kernel version 2.6.0.