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

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Message-ID: <e9ce88d6-0e2e-4b8b-825a-bcb85180e21d@redhat.com>
Date: Thu, 15 Feb 2024 11:42:26 +0100
From: David Hildenbrand <david@...hat.com>
To: Ryan Roberts <ryan.roberts@....com>,
 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>, Mark Rutland <mark.rutland@....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>
Cc: 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 15.02.24 11:31, 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>
> ---
>   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);

Acked-by: David Hildenbrand <david@...hat.com>

-- 
Cheers,

David / dhildenb