linux-kernel - Re: [PATCH v2 18/19] mm/arm64: Support large pfn mappings

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Message-ID: <Z9tDjOk-JdV_fCY4@kbusch-mbp.dhcp.thefacebook.com>
Date: Wed, 19 Mar 2025 16:22:04 -0600
From: Keith Busch <kbusch@...nel.org>
To: Peter Xu <peterx@...hat.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Gavin Shan <gshan@...hat.com>,
	Catalin Marinas <catalin.marinas@....com>, x86@...nel.org,
	Ingo Molnar <mingo@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Alistair Popple <apopple@...dia.com>, kvm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Sean Christopherson <seanjc@...gle.com>,
	Oscar Salvador <osalvador@...e.de>,
	Jason Gunthorpe <jgg@...dia.com>, Borislav Petkov <bp@...en8.de>,
	Zi Yan <ziy@...dia.com>, Axel Rasmussen <axelrasmussen@...gle.com>,
	David Hildenbrand <david@...hat.com>,
	Yan Zhao <yan.y.zhao@...el.com>, Will Deacon <will@...nel.org>,
	Kefeng Wang <wangkefeng.wang@...wei.com>,
	Alex Williamson <alex.williamson@...hat.com>
Subject: Re: [PATCH v2 18/19] mm/arm64: Support large pfn mappings

On Mon, Aug 26, 2024 at 04:43:52PM -0400, Peter Xu wrote:
> +#ifdef CONFIG_ARCH_SUPPORTS_PUD_PFNMAP
> +#define pud_special(pte)	pte_special(pud_pte(pud))
> +#define pud_mkspecial(pte)	pte_pud(pte_mkspecial(pud_pte(pud)))
> +#endif

Sorry for such a late reply, but this looked a bit weird as I'm doing
some backporting. Not that I'm actually interested in this arch, so I
can't readily test this, but I believe the intention was to name the
macro argument "pud", not "pte".