inux-kernel@vger.kernel.org; linux-
> m...@kvack.org; Suzuki Poulose ; Punit
> Agrawal ; Anshuman Khandual
> ; Alex Van Brunt
> ; Robin Murphy ;
> Thomas Gleixner ; Andrew Morton foundation.org>; Jérôme Glisse ; Ralph Campbell
> ; hejia...@gmail.com; Kaly Xin (Arm Technology
&g
On Sat, Sep 21, 2019 at 09:50:53PM +0800, Jia He wrote:
> diff --git a/arch/arm64/include/asm/pgtable.h
> b/arch/arm64/include/asm/pgtable.h
> index e09760ece844..4a9939615e41 100644
> --- a/arch/arm64/include/asm/pgtable.h
> +++ b/arch/arm64/include/asm/pgtable.h
> @@ -868,6 +868,18 @@ static
On arm64 without hardware Access Flag, copying fromuser will fail because
the pte is old and cannot be marked young. So we always end up with zeroed
page after fork() + CoW for pfn mappings. we don't always have a
hardware-managed access flag on arm64.
Hence implement arch_faults_on_old_pte on
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