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| BLK_RQ_MAP_KERN(9) | Block Devices | BLK_RQ_MAP_KERN(9) |
NAME¶
blk_rq_map_kern - map kernel data to a request, for passthrough requests
SYNOPSIS¶
int blk_rq_map_kern(struct request_queue * q, struct request * rq, void * kbuf, unsigned int len, gfp_t gfp_mask);
ARGUMENTS¶
struct request_queue * q
request queue where request should be inserted
struct request * rq
request to fill
void * kbuf
the kernel buffer
unsigned int len
length of user data
gfp_t gfp_mask
memory allocation flags
DESCRIPTION¶
Data will be mapped directly if possible. Otherwise a bounce buffer is used. Can be called multiple times to append multiple buffers.
COPYRIGHT¶
| June 2017 | Kernel Hackers Manual 4.11 |