Dead arch/x86 UV code?

Dead arch/x86 UV code?

[Dave Hansen]

Hi Folks,

I threw a silly LLM at arch/x86 trying to find unused code. One of the
things that stood out was UV:

 arch/x86/include/asm/uv/bios.h       |    3
 arch/x86/include/asm/uv/uv_hub.h     |  156 ---------------
 arch/x86/include/asm/uv/uv_irq.h     |   37 ---
 arch/x86/kernel/apic/x2apic_uv_x.c   |  187 ------------------
 arch/x86/platform/uv/bios_uv.c       |   44 ----
 arch/x86/platform/uv/uv_irq.c        |  210 ---------------------
 b/arch/x86/include/asm/hw_irq.h      |   15 -
 b/arch/x86/include/asm/uv/bios.h     |   11 -
 b/arch/x86/include/asm/uv/uv.h       |    2
 b/arch/x86/include/asm/uv/uv_geo.h   |    2
 b/arch/x86/include/asm/uv/uv_hub.h   |  156 ---------------
 b/arch/x86/kernel/apic/x2apic_uv_x.c |   70 -------
 b/arch/x86/kernel/cpu/common.c       |    4
 b/arch/x86/platform/uv/Makefile      |    2
 b/arch/x86/platform/uv/bios_uv.c     |    4
 16 files changed, 15 insertions(+), 891 deletions(-)

It looks like a big chunk of it was just there to support some drivers
that are now gone with:

  dbf69afe320e ("misc: sgi-xp: Remove SGI XP drivers")
  85de4712bccf ("misc: sgi-gru: Remove SGI GRU driver")

I spot checked some of LLM spew. It didn't all seem to be noise. Could
folks find some time to go through and see if this really is dead code?

LLM spew is here:

	https://sr71.net/~dave/intel/uv/

Re: Dead arch/x86 UV code?

[Steve Wahl]

On Wed, Sep 23, 2026 at 06:29:56AM -0700, Dave Hansen wrote:
> Hi Folks,
> 
> I threw a silly LLM at arch/x86 trying to find unused code. One of the
> things that stood out was UV:

Thanks, Dave, we (HPE folk you listed) will look at these.  It may
take a few days to get to them, so I wanted to send a short note so
you'd know you weren't being ignored!

--> Steve
-- 
Steve Wahl, Hewlett Packard Enterprise

Re: Dead arch/x86 UV code?

[Dave Hansen]

On 9/23/26 08:30, Steve Wahl wrote:
>> I threw a silly LLM at arch/x86 trying to find unused code. One of the
>> things that stood out was UV:
> Thanks, Dave, we (HPE folk you listed) will look at these.  It may
> take a few days to get to them, so I wanted to send a short note so
> you'd know you weren't being ignored!

Thanks! Also, it's no hurry at all. I'd be quite happy to see some
patches in the next month or so.