linux-kernel - Re: [PATCH v6 04/18] arm64/mm: Convert pte_next_pfn() to pte_advance

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Date: Thu, 15 Feb 2024 11:17:59 +0000
From: Mark Rutland <mark.rutland@....com>
To: Ryan Roberts <ryan.roberts@....com>
Cc: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Ard Biesheuvel <ardb@...nel.org>,
	Marc Zyngier <maz@...nel.org>, James Morse <james.morse@....com>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Matthew Wilcox <willy@...radead.org>,
	David Hildenbrand <david@...hat.com>,
	Kefeng Wang <wangkefeng.wang@...wei.com>,
	John Hubbard <jhubbard@...dia.com>, Zi Yan <ziy@...dia.com>,
	Barry Song <21cnbao@...il.com>,
	Alistair Popple <apopple@...dia.com>,
	Yang Shi <shy828301@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	linux-arm-kernel@...ts.infradead.org, x86@...nel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 04/18] arm64/mm: Convert pte_next_pfn() to
 pte_advance_pfn()

On Thu, Feb 15, 2024 at 10:31:51AM +0000, Ryan Roberts wrote:
> Core-mm needs to be able to advance the pfn by an arbitrary amount, so
> override the new pte_advance_pfn() API to do so.
> 
> Signed-off-by: Ryan Roberts <ryan.roberts@....com>

Acked-by: Mark Rutland <mark.rutland@....com>

Mark.

> ---
>  arch/arm64/include/asm/pgtable.h | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
> index 52d0b0a763f1..b6d3e9e0a946 100644
> --- a/arch/arm64/include/asm/pgtable.h
> +++ b/arch/arm64/include/asm/pgtable.h
> @@ -351,10 +351,10 @@ static inline pgprot_t pte_pgprot(pte_t pte)
>  	return __pgprot(pte_val(pfn_pte(pfn, __pgprot(0))) ^ pte_val(pte));
>  }
>  
> -#define pte_next_pfn pte_next_pfn
> -static inline pte_t pte_next_pfn(pte_t pte)
> +#define pte_advance_pfn pte_advance_pfn
> +static inline pte_t pte_advance_pfn(pte_t pte, unsigned long nr)
>  {
> -	return pfn_pte(pte_pfn(pte) + 1, pte_pgprot(pte));
> +	return pfn_pte(pte_pfn(pte) + nr, pte_pgprot(pte));
>  }
>  
>  static inline void set_ptes(struct mm_struct *mm,
> @@ -370,7 +370,7 @@ static inline void set_ptes(struct mm_struct *mm,
>  		if (--nr == 0)
>  			break;
>  		ptep++;
> -		pte = pte_next_pfn(pte);
> +		pte = pte_advance_pfn(pte, 1);
>  	}
>  }
>  #define set_ptes set_ptes
> -- 
> 2.25.1
>