do_vfs_ioctl     2848 fs/compat_ioctl.c 	error = do_vfs_ioctl(filp, fd, cmd, arg);
do_vfs_ioctl      485 fs/ioctl.c     	error = do_vfs_ioctl(filp, fd, cmd, arg);
do_vfs_ioctl     2057 include/linux/fs.h extern int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,