BLK_ADD_REQUEST_PAYL(9) Block Devices BLK_ADD_REQUEST_PAYL(9)NAME
blk_add_request_payload - add a payload to a request
void blk_add_request_payload(struct request * rq, struct page * page, unsigned int len);
request to update
page backing the payload
length of the payload.
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
Note that this is a quite horrible hack and nothing but handling of discard requests should ever use it.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 BLK_ADD_REQUEST_PAYL(9)
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