NAME blk_add_request_payload - add a payload to a request

SYNOPSIS void blk_add_request_payload(struct request * rq, struct page * page, unsigned int len);

ARGUMENTS rq request to update

page page backing the payload

len length of the payload.

DESCRIPTION This allows to later add a payload to an already submitted request by a block driver. The driver needs to take care of freeing the payload itself.

Note that this is a quite horrible hack and nothing but handling of discard requests should ever use it.

COPYRIGHT Kernel Hackers Manual 2.6. November 2011 BLK_ADD_REQUEST_PAYL(9)