centos man page for bio_map_user

BIO_MAP_USER(9) 						   The Linux VFS						   BIO_MAP_USER(9)

NAME
       bio_map_user - map user address into bio

SYNOPSIS
       struct bio * bio_map_user(struct request_queue * q, struct block_device * bdev, unsigned long uaddr, unsigned int len, int write_to_vm,
				 gfp_t gfp_mask);

ARGUMENTS
       q
	   the struct request_queue for the bio

       bdev
	   destination block device

       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
       Map the user space address into a bio suitable for io to a block device. Returns an error pointer in case of error.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							   BIO_MAP_USER(9)