在linux内核中设置模块的许可证

I've written some kernel modules in Ada, and I've hit a bit of a problem. License is defined as a c macro, and I can't work out what it actually is. Is it a suitable solution to simply have some c re-exporting all the c functions which require GPL if both the c and the ada module have GPL compatible licenses? Is there a better way to do this?I've written some kernel modules in Ada, and I'