On Wed, May 17, 2023 at 9:22 AM Greg KH <greg@xxxxxxxxx> wrote: > > On Wed, May 17, 2023 at 09:16:45AM +0100, Lucas Tanure wrote: > > Hi, > > > > Can I build a driver in the mainline kernel to a previous kernel version? > > Not easily, and you really do not want to do that as the whole kernel > source, drivers included, are a snapshot in time and depend on each > other. > > > Like, in the mainline kernel, I have a Z driver, and I want to use > > that driver for my current stable driver in my embedded system with > > version kernel 5.15. Is there a procedure to build a kernel driver > > against other specific kernel headers? > > Update to a newer kernel version, it will be much easier and simpler > overall. > > Drivers consume _everything_ from the core kernel, and are not > stand-alone at all. They depend on everything else, trying to pick one > out and put it into a different kernel is not how Linux works at all, > sorry. > > What prevents you from just using a newer kernel? > > thanks, > > greg k-h It's not me or my team; it's every client for the company I work for that uses different kernel versions. And I am investigating how we can upstream our driver in the future and provide our driver to all customers having to support many different kernel versions. I think the only way is to have a few kernel branches with different kernel versions, but our driver is updated in those branches. Any better idea? Thanks! Lucas _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
