linux-kernel - Re: [PATCH v3 5/7] mm, x86: Use for_each_valid_pfn() from __ioremap_check

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Message-ID: <aAjLR4b6qsmzfRdw@kernel.org>
Date: Wed, 23 Apr 2025 14:13:11 +0300
From: Mike Rapoport <rppt@...nel.org>
To: David Woodhouse <dwmw2@...radead.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	"Sauerwein, David" <dssauerw@...zon.de>,
	Anshuman Khandual <anshuman.khandual@....com>,
	Ard Biesheuvel <ardb@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	David Hildenbrand <david@...hat.com>, Marc Zyngier <maz@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Mike Rapoport <rppt@...ux.ibm.com>, Will Deacon <will@...nel.org>,
	kvmarm@...ts.cs.columbia.edu, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Ruihan Li <lrh2000@....edu.cn>
Subject: Re: [PATCH v3 5/7] mm, x86: Use for_each_valid_pfn() from
 __ioremap_check_ram()

On Wed, Apr 23, 2025 at 08:52:47AM +0100, David Woodhouse wrote:
> From: David Woodhouse <dwmw@...zon.co.uk>
> 
> Instead of calling pfn_valid() separately for every single PFN in the
> range, use for_each_valid_pfn() and only look at the ones which are.
> 
> Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>

Acked-by: Mike Rapoport (Microsoft) <rppt@...nel.org>

> ---
>  arch/x86/mm/ioremap.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)

-- 
Sincerely yours,
Mike.