Fields
opcode: u16,
arg: extern union { register_op: IORING_REGISTER, sqe_op: IORING_OP, sqe_flags: u8, },
resv: u8,
resv2: [3]u32,
opcode: u16,
arg: extern union { register_op: IORING_REGISTER, sqe_op: IORING_OP, sqe_flags: u8, },
resv: u8,
resv2: [3]u32,