pub fn sys_process_vm_writev(
locked: &mut Locked<Unlocked>,
current_task: &CurrentTask,
tid: tid_t,
local_iov_addr: IOVecPtr,
local_iov_count: UserValue<i32>,
remote_iov_addr: IOVecPtr,
remote_iov_count: UserValue<i32>,
flags: usize,
) -> Result<usize, Errno>