linux-kernel - Re: [PATCH] arm64/mm: Drop HAVE_ARCH_PFN

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Message-ID: <20210527174913.GJ8661@arm.com>
Date:   Thu, 27 May 2021 18:49:13 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Anshuman Khandual <anshuman.khandual@....com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Will Deacon <will@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Mike Rapoport <rppt@...nel.org>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH] arm64/mm: Drop HAVE_ARCH_PFN_VALID

On Tue, May 25, 2021 at 06:25:49PM +0530, Anshuman Khandual wrote:
> CONFIG_SPARSEMEM_VMEMMAP is now the only available memory model on arm64
> platforms and free_unused_memmap() would just return without creating any
> holes in the memmap mapping. There is no need for any special handling in
> pfn_valid() and HAVE_ARCH_PFN_VALID can just be dropped. This also moves
> the pfn upper bits sanity check into generic pfn_valid().
> 
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will@...nel.org>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: David Hildenbrand <david@...hat.com>
> Cc: Mike Rapoport <rppt@...nel.org>
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-mm@...ck.org
> Acked-by: Mike Rapoport <rppt@...ux.ibm.com>
> Acked-by: David Hildenbrand <david@...hat.com>
> Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>

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