Map kernel address into bio
struct bio * bio_map_kern(struct request_queue * q, void * data, unsigned int len, gfp_t gfp_mask);
q
the struct request_queue 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.