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Date:   Wed, 16 Nov 2022 14:41:07 +0000
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Anshuman Khandual <anshuman.khandual@arm.com>
Cc:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        will@kernel.org, Suzuki K Poulose <suzuki.poulose@arm.com>,
        James Morse <james.morse@arm.com>,
        Jonathan Corbet <corbet@lwn.net>,
        Mark Rutland <mark.rutland@arm.com>, linux-doc@vger.kernel.org
Subject: Re: [PATCH V3 2/2] arm64: errata: Workaround possible Cortex-A715
 [ESR|FAR]_ELx corruption
Message-ID: <Y3T2g5yvOSfkAHmm@arm.com>
References: <20221116140915.356601-1-anshuman.khandual@arm.com>
 <20221116140915.356601-3-anshuman.khandual@arm.com>
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On Wed, Nov 16, 2022 at 07:39:15PM +0530, Anshuman Khandual wrote:
> diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h
> index d20f5da2d76f..6a4a1ab8eb23 100644
> --- a/arch/arm64/include/asm/hugetlb.h
> +++ b/arch/arm64/include/asm/hugetlb.h
> @@ -49,6 +49,15 @@ extern pte_t huge_ptep_get(pte_t *ptep);
>  
>  void __init arm64_hugetlb_cma_reserve(void);
>  
> +#define huge_ptep_modify_prot_start huge_ptep_modify_prot_start
> +extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma,
> +					 unsigned long addr, pte_t *ptep);
> +
> +#define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit
> +extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
> +					 unsigned long addr, pte_t *ptep,
> +					 pte_t old_pte, pte_t new_pte);

I wonder whether we should have kept this as static inline in the header
file. But we can move them later if anyone complains of a performance
regression.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>