On 21 Jan 2022, at 16:53, Greg KH wrote: > On Fri, Jan 21, 2022 at 04:21:18PM +0800, Tianrui Wei wrote: >>>> If there're not out of box solutions, is there a way I could view the >>>> API changes in every subsystem clearly? For example, this particular >>>> commit[^1] shows the second return argument is being removed from >>>> ki_complete, and it took a lot of fishing down the lkml to do. Perhaps >>>> there is a simpler way? >>> >>> Use git itself to track the changes in apis. You can see all changes to >>> a .h file by doing: >>> git log -p path/to/file >>> and then see where the api got changed. >> >> This is a really good suggestion, and it's also the way I approach >> recent kernel modules. However some specifically ancient kernel >> modules is rather difficult to use this approach. > > We have git history going back to Linux 0.1 so this should work. If > not, then do the normal 'does it build' test. APIs are almost always > changed in ways that break the build. Thanks for the suggestion, I'll bear it in mind. > >>> It usually isn't that difficult to forward port a driver, but it all >>> depends on the age of the code, and what it actually does. Do you have >>> a link to the code you wish to drag forward? >> >> The specific driver I had in mind is a PCIE driver for a Xilinx IP >> block. It's under >> https://www.xilinx.com/products/boards-and-kits/ek-k7-kc705-g.html#resources >> in a zip folder called rdf0281-kc705-base-trd-2014-3.zip. Everyone >> with a xilinx account could download the folder. Unfortunately its >> header claims it contains confidential information from Xilinx, as >> such I'm a bit wary to post it online. > > Please get support from xilix for stuff like this. You are paying for > it from them, so please take advantage of it. Especially if they claim > that their code is not GPLv2 compatible, you want them to take that > legal risk, not you :) Thanks! That makes a lot of sense. > > greg k-h Best Regards, Tianrui _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
