Re: [linus:master] [atomic] 80047d84ee: WARNING:at_include/linux/instrumented.h:#__split_huge_pmd_locked

[Arnd Bergmann]

On Tue, Nov 3, 2026, at 13:35, Sasha Levin wrote:
>
> I tried the typedef change. It works, but gcc ends up realigning the
> stack in a lot of pte/pmd code (126 more functions with Arnd's version
> in a small config, 204 with yours), including handle_mm_fault(). Just
> aligning the two locals seems simpler:

The question is how many of the other functions may be affected by the
same bug. I see a variation of the same code in vmemmap_split_pmd(),
and aligning the types is clearly the safer option here, especially
given that most 32-bit architectures already align u64 all the time
the same way that 64-bit ones do.

     Arnd