linux-kernel - Re: [PATCH 1/2] arm64/mm: Remove CONT_RANGE

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Date:   Thu, 10 Sep 2020 11:29:46 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     Gavin Shan <gshan@...hat.com>, linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, catalin.marinas@....com,
        will@...nel.org, shan.gavin@...il.com
Subject: Re: [PATCH 1/2] arm64/mm: Remove CONT_RANGE_OFFSET



On 09/08/2020 12:49 PM, Gavin Shan wrote:
> The macro was introduced by commit <ecf35a237a85> ("arm64: PTE/PMD
> contiguous bit definition") at the beginning. It's only used by
> commit <348a65cdcbbf> ("arm64: Mark kernel page ranges contiguous"),
> which was reverted later by commit <667c27597ca8>. This makes the
> macro unused.
> 
> This removes the unused macro (CONT_RANGE_OFFSET).
> 
> Signed-off-by: Gavin Shan <gshan@...hat.com>
> ---
>  arch/arm64/include/asm/pgtable-hwdef.h | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
> index d400a4d9aee2..8a399e666837 100644
> --- a/arch/arm64/include/asm/pgtable-hwdef.h
> +++ b/arch/arm64/include/asm/pgtable-hwdef.h
> @@ -98,8 +98,6 @@
>  #define CONT_PMDS		(1 << (CONT_PMD_SHIFT - PMD_SHIFT))
>  #define CONT_PMD_SIZE		(CONT_PMDS * PMD_SIZE)
>  #define CONT_PMD_MASK		(~(CONT_PMD_SIZE - 1))
> -/* the numerical offset of the PTE within a range of CONT_PTES */
> -#define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_PTES-1))
>  
>  /*
>   * Hardware page table definitions.
> 

Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>