Re: [PATCH V2 12/14] LoongArch: Adjust VDSO/VSYSCALL for 32BIT/64BIT

[Huacai Chen]

Hi, Arnd,

On Tue, Nov 18, 2025 at 9:42 PM Arnd Bergmann <arnd@xxxxxxxx> wrote:
>
> On Tue, Nov 18, 2025, at 12:27, Huacai Chen wrote:
> > Adjust VDSO/VSYSCALL because read_cpu_id() for 32BIT/64BIT are
> > different, and LoongArch32 doesn't support GENERIC_GETTIMEOFDAY now.
> >
> > Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
> > Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
>
> Are you planning to add vdso_clock_gettime() later, or is the
> architecture missing hardware access to the timer register
> on loongarch32?
Hardware has no problem, vdso_clock_gettime() will be added later.

Huacai

>
> It would be good to add some comments here to ensure this is
> done correctly if someone adds the vdso32 support later:
> There should be clock_gettime32 support, but not the old
> clock_gettime(), clock_getres() or time().
>
>        Arnd
>