blk_rq_map_kern (9) - Linux Man Pages

blk_rq_map_kern: map kernel data to a request, for REQ_TYPE_BLOCK_PC usage

NAME

blk_rq_map_kern - map kernel data to a request, for REQ_TYPE_BLOCK_PC usage

SYNOPSIS

int blk_rq_map_kern(struct request_queue q, struct request rq, void kbuf, unsigned int len, gfp_t gfp_mask);

ARGUMENTS

q

request queue where request should be inserted

rq

request to fill

kbuf

the kernel buffer

len

length of user data

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.

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