Re: [PATCH] cpu-hotplug: provide prototypes for arch CPU registration

Russell King (Oracle)
2023-10-10T16:24:03Z

Okay, I give up. 15 days, still no real progress. I don't see any point
in submitting any further patches for the kernel outside of those areas
that I maintain. Clearly no one cares enough to bother (a) properly
reviewing the patch, (b) applying the patch that Thomas thought
"makes tons of sense."

If patches that "makes tons of sense" just get ignored, then what does
the future of the kernel hold? Crap, that's what, utter crap.

As I said, it seems that the Linux kernel process is basically totally
broken and rotten. If a six line patch that "makes tons of sense" can't
be applied, then there's basically no hope what so ever.

FFS.

On Mon, Sep 25, 2023 at 05:28:39PM +0100, Russell King (Oracle) wrote:
> Provide common prototypes for arch_register_cpu() and
> arch_unregister_cpu(). These are called by acpi_processor.c, with
> weak versions, so the prototype for this is already set. It is
> generally not necessary for function prototypes to be conditional
> on preprocessor macros.
>
> Some architectures (e.g. Loongarch) are missing the prototype for this,
> and rather than add it to Loongarch's asm/cpu.h, lets do the job once
> for everyone.
>
> Since this covers everyone, remove the now unnecessary prototypes in
> asm/cpu.h, and we also need to remove the 'static' from one of ia64's
> arch_register_cpu() definitions.
>
> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> ---
> Changes since RFC v2:
> - drop ia64 changes, as ia64 has already been removed.
>
> arch/x86/include/asm/cpu.h | 2 --
> arch/x86/kernel/topology.c | 2 +-
> include/linux/cpu.h | 2 ++
> 3 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
> index 3a233ebff712..25050d953eee 100644
> --- a/arch/x86/include/asm/cpu.h
> +++ b/arch/x86/include/asm/cpu.h
> @@ -28,8 +28,6 @@ struct x86_cpu {
> };
>
> #ifdef CONFIG_HOTPLUG_CPU
> -extern int arch_register_cpu(int num);
> -extern void arch_unregister_cpu(int);
> extern void soft_restart_cpu(void);
> #endif
>
> diff --git a/arch/x86/kernel/topology.c b/arch/x86/kernel/topology.c
> index ca004e2e4469..0bab03130033 100644
> --- a/arch/x86/kernel/topology.c
> +++ b/arch/x86/kernel/topology.c
> @@ -54,7 +54,7 @@ void arch_unregister_cpu(int num)
> EXPORT_SYMBOL(arch_unregister_cpu);
> #else /* CONFIG_HOTPLUG_CPU */
>
> -static int __init arch_register_cpu(int num)
> +int __init arch_register_cpu(int num)
> {
> return register_cpu(&per_cpu(cpu_devices, num).cpu, num);
> }
> diff --git a/include/linux/cpu.h b/include/linux/cpu.h
> index 0abd60a7987b..eb768a866fe3 100644
> --- a/include/linux/cpu.h
> +++ b/include/linux/cpu.h
> @@ -80,6 +80,8 @@ extern __printf(4, 5)
> struct device *cpu_device_create(struct device *parent, void *drvdata,
> const struct attribute_group **groups,
> const char *fmt, ...);
> +extern int arch_register_cpu(int cpu);
> +extern void arch_unregister_cpu(int cpu);
> #ifdef CONFIG_HOTPLUG_CPU
> extern void unregister_cpu(struct cpu *cpu);
> extern ssize_t arch_cpu_probe(const char *, size_t);
> --
> 2.30.2
>
>

--
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