Re: [RESEND PATCH 2/4] x86: add phys addr validity check for /dev/mem mmap

From: Thomas Gleixner
Date: Mon Sep 29 2014 - 16:15:08 EST

On Mon, 29 Sep 2014, Frantisek Hrbata wrote:
> V2: fix pfn check in valid_mmap_phys_addr_range, thanks to Dave Hansen

AFAICT, Dave also asked you to change size_t count into something more
intuitive, i.e. nr_bytes or such.

> +int valid_mmap_phys_addr_range(unsigned long pfn, size_t count)

And right he is. I really had to look twice to see that count is
actually number of bytes and not number of pages, which is what you
expect after pfn.

> +{
> + return arch_pfn_possible(pfn + (count >> PAGE_SHIFT));
> +}


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