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SubjectRe: [patch 4/8] x86 PAT: hooks in generic vm code to help archs to track pfnmap regions
On Wed, 12 Nov 2008 13:26:51 -0800
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> wrote:

> --- tip.orig/mm/memory.c 2008-11-11 10:10:11.000000000 -0800
> +++ tip/mm/memory.c 2008-11-11 12:10:18.000000000 -0800
> @@ -99,6 +99,28 @@ int randomize_va_space __read_mostly =
> 2;
> #endif
>
> +#ifndef track_pfn_vma_new
> +int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t prot,
> + unsigned long pfn, unsigned long size)
> +{
> + return 0;
> +}
> +#endif
> +
> +#ifndef track_pfn_vma_copy
> +int track_pfn_vma_copy(struct vm_area_struct *vma)
> +{
> + return 0;
> +}
> +#endif
> +
> +#ifndef untrack_pfn_vma
> +void untrack_pfn_vma(struct vm_area_struct *vma, unsigned long pfn,
> + unsigned long size)
> +{
> +}
> +#endif

Using __weak would provide a somewhat neater result here.


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