bio_map_kern - map kernel address into bio
struct bio * bio_map_kern (request_queue_t * q, void * data, unsigned int len, gfp_t gfp_mask);
q the request_queue_t for the bio data pointer to buffer to map len length in bytes gfp_mask allocation flags for bio allocation
Map the kernel address into a bio suitable for io to a block device. Returns an error pointer in case of error.