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- wheezy 3.2.78-1
BIO_COPY_USER(9) | The Linux VFS | BIO_COPY_USER(9) |
NAME¶
bio_copy_user - copy user data to bioSYNOPSIS¶
struct
bio * bio_copy_user(struct request_queue * q,
struct rq_map_data * map_data,
unsigned long uaddr,
unsigned int len, int write_to_vm,
gfp_t gfp_mask);
ARGUMENTS¶
qdestination block queue
map_data
pointer to the rq_map_data holding pages (if
necessary)
uaddr
start of user address
len
length in bytes
write_to_vm
bool indicating writing to pages or not
gfp_mask
memory allocation flags
DESCRIPTION¶
Prepares and returns a bio for indirect user io, bouncing data to/from kernel pages as necessary. Must be paired with call bio_uncopy_user on io completion.COPYRIGHT¶
March 2016 | Kernel Hackers Manual 3.2. |