I told rmk about this long time ago.
On 4/12/05, [email protected] <[email protected]> wrote:
>
> From: Russell King <[email protected]>
>
> Oddly, max_low_pfn/max_pfn end up being the number of pages in the system,
> rather than the maximum PFN on ARM. This doesn't seem to cause any problems,
> so just add a note about it.
>
> Signed-off-by: Russell King <[email protected]>
> Signed-off-by: Andrew Morton <[email protected]>
> ---
>
> 25-akpm/arch/arm/mm/init.c | 3 +++
> 1 files changed, 3 insertions(+)
>
> diff -puN arch/arm/mm/init.c~arm-add-comment-about-max_low_pfn-max_pfn arch/arm/mm/init.c
> --- 25/arch/arm/mm/init.c~arm-add-comment-about-max_low_pfn-max_pfn 2005-04-12 03:21:04.967381744 -0700
> +++ 25-akpm/arch/arm/mm/init.c 2005-04-12 03:21:04.971381136 -0700
> @@ -223,6 +223,9 @@ find_memend_and_nodes(struct meminfo *mi
> * This doesn't seem to be used by the Linux memory
> * manager any more. If we can get rid of it, we
> * also get rid of some of the stuff above as well.
> + *
> + * Note: max_low_pfn and max_pfn reflect the number
> + * of _pages_ in the system, not the maximum PFN.
> */
> max_low_pfn = memend_pfn - O_PFN_DOWN(PHYS_OFFSET);
> max_pfn = memend_pfn - O_PFN_DOWN(PHYS_OFFSET);
> _
--
Coywolf Qi Hunt
http://sosdg.org/~coywolf/
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