prep_fsync

pub fn prep_fsync(sqe: *linux.io_uring_sqe, fd: linux.fd_t, flags: u32) void {
    sqe.* = .{
        .opcode = .FSYNC,
        .flags = 0,
        .ioprio = 0,
        .fd = fd,
        .off = 0,
        .addr = 0,
        .len = 0,
        .rw_flags = flags,
        .user_data = 0,
        .buf_index = 0,
        .personality = 0,
        .splice_fd_in = 0,
        .addr3 = 0,
        .resv = 0,
    };
}