Function ioctl_expr

pub const fn ioctl_expr(
    dir: c_uint,
    ty: c_uint,
    nr: c_uint,
    size: c_uint,
) -> c_ulong

Function to calculate icotl number. Mimic of _IOC

const KVMIO: c_uint = 0xAE;
ioctl_expr(_IOC_NONE, KVMIO, 0x01, 0);