pub unsafe extern "C" fn crypt_activate_by_keyslot_context(
cd: *mut crypt_device,
name: *const c_char,
keyslot: c_int,
kc: *mut crypt_keyslot_context,
additional_keyslot: c_int,
additional_kc: *mut crypt_keyslot_context,
flags: u32,
) -> c_int