From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Mike Rapoport <rppt@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Andreas Larsson <andreas@gaisler.com>,
Borislav Petkov <bp@alien8.de>, Brian Cain <bcain@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
"Christophe Leroy (CS GROUP)" <chleroy@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Dave Hansen <dave.hansen@linux.intel.com>,
Dinh Nguyen <dinguyen@kernel.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Guo Ren <guoren@kernel.org>, Helge Deller <deller@gmx.de>,
Huacai Chen <chenhuacai@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Johannes Berg <johannes@sipsolutions.net>,
John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Magnus Lindholm <linmag7@gmail.com>,
Matt Turner <mattst88@gmail.com>,
Max Filippov <jcmvbkbc@gmail.com>,
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Michal Hocko <mhocko@suse.com>, Michal Simek <monstr@monstr.eu>,
Palmer Dabbelt <palmer@dabbelt.com>,
Richard Weinberger <richard@nod.at>,
Russell King <linux@armlinux.org.uk>,
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Suren Baghdasaryan <surenb@google.com>,
Thomas Gleixner <tglx@kernel.org>,
Vineet Gupta <vgupta@kernel.org>,
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linux-mm@kvack.org, x86@kernel.org
Subject: Re: [PATCH v3 1/4] mm: don't special case !MMU for is_zero_pfn() and my_zero_pfn()
Date: Thu, 12 Feb 2026 09:58:24 +0100 [thread overview]
Message-ID: <a9834da2-67c5-4641-8ca1-fc5ba067572e@kernel.org> (raw)
In-Reply-To: <20260211103141.3215197-2-rppt@kernel.org>
On 2/11/26 11:31, Mike Rapoport wrote:
> From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>
>
> nommu architectures have empty_zero_page and define ZERO_PAGE() and
> although they don't really use it to populate page tables, there is no
> reason to hardwire !MMU implementation of is_zero_pfn() and my_zero_pfn()
> to 0.
>
> Drop #ifdef CONFIG_MMU around implementations of is_zero_pfn() and
> my_zero_pfn() and remove !MMU version.
>
> While on it, make zero_pfn __ro_after_init.
>
> Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
> ---
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
--
Cheers,
David
next prev parent reply other threads:[~2026-02-12 8:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-11 10:31 [PATCH v3 0/4] arch, mm: consolidate empty_zero_page Mike Rapoport
2026-02-11 10:31 ` [PATCH v3 1/4] mm: don't special case !MMU for is_zero_pfn() and my_zero_pfn() Mike Rapoport
2026-02-12 8:58 ` David Hildenbrand (Arm) [this message]
2026-02-12 18:30 ` Liam R. Howlett
2026-02-11 10:31 ` [PATCH v3 2/4] mm: rename my_zero_pfn() to zero_pfn() Mike Rapoport
2026-02-12 9:01 ` David Hildenbrand (Arm)
2026-02-12 15:28 ` Vlastimil Babka
2026-02-12 18:33 ` Liam R. Howlett
2026-02-11 10:31 ` [PATCH v3 3/4] arch, mm: consolidate empty_zero_page Mike Rapoport
2026-02-11 20:14 ` Magnus Lindholm
2026-02-12 5:33 ` Dinh Nguyen
2026-02-12 8:38 ` Andreas Larsson
2026-02-12 9:04 ` David Hildenbrand (Arm)
2026-02-12 18:38 ` Liam R. Howlett
2026-02-11 10:31 ` [PATCH v3 4/4] mm: cache struct page for empty_zero_page and return it from ZERO_PAGE() Mike Rapoport
2026-02-12 9:08 ` David Hildenbrand (Arm)
2026-02-12 18:40 ` Liam R. Howlett
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