On Wed, 15 Feb 2023 09:00:28 PST (-0800), ardb@xxxxxxxxxx wrote:
On Wed, 15 Feb 2023 at 17:50, Palmer Dabbelt <palmer@xxxxxxxxxxx> wrote:On Wed, 15 Feb 2023 02:00:03 PST (-0800), ardb@xxxxxxxxxx wrote: > The IA64 port of Linux has no maintainer, and according to a report from > its only remaining user [0], it has been broken for a month and nobody > cares. > > Given that keeping a complex but unused architecture alive uses up > valuable developer bandwidth, let's just get rid of it. > > This supersedes my patch proposing to mark it as 'dead', which received > no replies from anyone that wants to keep it alive. [1] > > [0] https://www.spinics.net/lists/linux-ia64/msg21926.html > [1] https://lore.kernel.org/all/20230128122904.1345120-1-ardb@xxxxxxxxxx/ > > Cc: Jonathan Corbet <corbet@xxxxxxx> > Cc: Arnd Bergmann <arnd@xxxxxxxx> > Cc: Tony Luck <tony.luck@xxxxxxxxx> > Cc: Jessica Clarke <jrtc27@xxxxxxxxxx> > Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx> > Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> > Cc: Marc Zyngier <maz@xxxxxxxxxx> > Cc: Guenter Roeck <linux@xxxxxxxxxxxx> > Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Cc: linux-ia64@xxxxxxxxxxxxxxx > > Ard Biesheuvel (5): > arch: Remove Itanium (IA-64) architecture > kernel: Drop IA64 support from sig_fault handlers > Documentation: Drop IA64 from feature descriptions > lib/raid6: Drop IA64 support > Documentation: Drop or replace remaining mentions of IA64 Not sure if I'm missing it in the diff, but it looks like there's also a bunch of "#ifdef __ia64__" and "#ifdef __IA64__" type code spread throughout the kernel. I didn't look at the actual diff, but it's in files that aren't showing up in the diffstat.Thanks for taking a look. It seems I indeed missed a couple.Just "git grep -i __ia64__" lists a bunch. I didn't look at all of them, but at least spot checking include/acpi/actypes.h looks like it's a real Itanium workaround. If the arch goes, it's probbaly worth removing those too?The ACPI code is synced with another project, so I didn't touch it. Same goes for some other header files where IA-64 is referenced, e.g., in the PE/COFF header stuff.
Thanks, I didn't know that. Pretty sure there's some scattered in drivers, but...
There's also some mentions of "Itanium" in Documentation outside that don't look like they got caught here. Not sure if they'd be worth getting rid of, though as they could still be useful examples. The blurb in Documentation/memory-barriers.txt looks pretty port-specific, though.Yeah, I don't think it is necessary to rewrite history soviet-style, so some remaining references are fine IMHO.
That seems reasonable to me -- assuming the port goes the rest is just dead code so it'll filter out over time (presumably all over userspace too, which will take a while).
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