Hi Arnd, On Tue, Apr 23, 2019 at 05:11:32PM +0200, Arnd Bergmann wrote: > When isdn4linux came up in the context of another patch series, I > remembered that we had discussed removing it a while ago. > > It turns out that the suggestion from Karsten Keil wa to remove I4L > in 2018 after the last public ISDN networks are shut down. This has > happened now (with a very small number of exceptions), so I guess it's > time to try again. > > We currently have three ISDN stacks in the kernel: the original > isdn4linux, the newer CAPI, and finally mISDN stack. > > As far as I can tell, anyone using ISDN with mainline kernel drivers in > the past few years uses mISDN, and this is typically used for voice-only > PBX installations that don't require a public network. > > The older stacks support additional features for data networks, but those > typically make no sense any more if there is no network to connect to. > > My proposal for this time is to kill off isdn4linux entirely, as it seems > to have been unusable for quite a while. This code has been abandoned > for many years and it does get in the way of maintenance.
I think there is an editing error somewhere above. Perhaps it should read ... and it does not get anything in the way of maintenance. > CAPI in turn is not quite as obsolete, but as I have been unable to find > any users, I would suggest moving it to drivers/staging while we > figure out if anyone is using it. If not, it can then be removed > as well. If it turns out that there are users that are on 5.x kernels > or need to update to them, we can decide to leave parts of it for > longer, or move them back. > > If anyone is still using isdn4linux and CAPI with modern kernels, please > speak up now. > > Arnd > > [1] https://patchwork.kernel.org/patch/8484861/#17900371 ...
