Re: [PATCH] x86 (Linux Tiny): configure out support for some processors

[Ingo Molnar <mingo@elte.hu>]

looks good to me, but the patch needs a serious #ifdef removal pass:

* Michael Opdenacker <michael-lists@free-electrons.com> wrote:

>  	switch (c->x86_vendor) {
> +#ifdef CONFIG_CPU_SUP_AMD
>  	case X86_VENDOR_AMD:
>  		early_init_amd(c);
>  		break;
> +#endif
> +#ifdef CONFIG_CPU_SUP_INTEL
>  	case X86_VENDOR_INTEL:
>  		early_init_intel(c);
>  		break;
> +#endif

would be nice to hide these #ifdefs into include files. (define 
early_init_intel()/etc. as an empty inline in an include file)

> +#ifdef CONFIG_CPU_SUP_INTEL
>  	intel_cpu_init();
> +#endif
> +#ifdef CONFIG_CPU_SUP_CYRIX
>  	cyrix_init_cpu();
> +#endif
> +#ifdef CONFIG_CPU_SUP_NSC
>  	nsc_init_cpu();
> +#endif
> +#ifdef CONFIG_CPU_SUP_AMD
>  	amd_init_cpu();
> +#endif
> +#ifdef CONFIG_CPU_SUP_CENTAUR
>  	centaur_init_cpu();
> +#endif
> +#ifdef CONFIG_CPU_SUP_TRANSMETA
>  	transmeta_init_cpu();
> +#endif
> +#ifdef CONFIG_CPU_SUP_NEXGEN
>  	nexgen_init_cpu();
> +#endif
> +#ifdef CONFIG_CPU_SUP_UMC
>  	umc_init_cpu();
> +#endif

ditto - hide this into cpu.h.

>  static int __cpuinit mwait_usable(const struct cpuinfo_x86 *c)
>  {
> +#ifdef CONFIG_CPU_SUP_AMD
>  	if (force_mwait)
>  		return 1;
> +#endif

same - use cpu.h to define force_mwait to 0 if !CPU_SUP_AMD.

> +#ifdef CONFIG_CPU_SUP_INTEL
>  static inline int page_kills_ppro(unsigned long pagenr)
>  {
>  	if (pagenr >= 0x70000 && pagenr <= 0x7003F)
>  		return 1;
>  	return 0;
>  }
> +#endif

put the #ifdef _inside_ the inline, thus:

> -	if (page_is_ram(pfn) && !(bad_ppro && page_kills_ppro(pfn))) {
> +	if (page_is_ram(pfn)
> +#ifdef CONFIG_CPU_SUP_INTEL
> +	    && !(bad_ppro && page_kills_ppro(pfn))
> +#endif

you can avoid this #ifdef. [handle bad_ppro too]

	Ingo