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.
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?
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.
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