BLK_ADD_REQUEST_PAYL - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Block Devices

NAMEblk_add_request_payload − add a payload to a request

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

ARGUMENTSrq request to update page page backing the payload len length of the payload​.

DESCRIPTIONThis 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​.

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