On 12.12.16 17:53:02, Yisheng Xie wrote:
> It seems that memblock_is_memory() is also too strict for early_pfn_valid,
> so what about this patch, which use common pfn_valid as early_pfn_valid
> when CONFIG_HAVE_ARCH_PFN_VALID=y:
> ------------
> diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
> index 0f088f3..9d596f3 100644
> --- a/include/linux/mmzone.h
> +++ b/include/linux/mmzone.h
> @@ -1200,7 +1200,17 @@ static inline int pfn_present(unsigned long pfn)
> #define pfn_to_nid(pfn) (0)
> #endif
>
> +#ifdef CONFIG_HAVE_ARCH_PFN_VALID
> +static inline int early_pfn_valid(unsigned long pfn)
> +{
> + if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS)
> + return 0;
> + return valid_section(__nr_to_section(pfn_to_section_nr(pfn)));
> +}
I sent a V2 patch that uses pfn_present(). This only initilizes
sections with memory.
-Robert
> +#define early_pfn_valid early_pfn_valid
> +#else
> #define early_pfn_valid(pfn) pfn_valid(pfn)
> +#endif
> void sparse_init(void);
> #else
> #define sparse_init() do {} while (0)
>
>
>
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