BLK_RQ_UNMAP_USER(9) Block Devices BLK_RQ_UNMAP_USER(9)
NAME blk_rq_unmap_user - unmap a request with user data
SYNOPSIS int blk_rq_unmap_user(struct bio * bio);
ARGUMENTS bio start of bio list
DESCRIPTION Unmap a rq previously mapped by blk_rq_map_user. The caller must supply the original rq->bio from the blk_rq_map_user return, since the I/O completion may have changed rq->bio.
COPYRIGHT Kernel Hackers Manual 2.6. July 2015 BLK_RQ_UNMAP_USER(9)