From: Catalin Marinas <catalin.marinas@arm.com>
To: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org, ryan.roberts@arm.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arm64/mm: Add a fallback stub for pgd_page_paddr()
Date: Thu, 13 Nov 2025 16:19:09 +0000 [thread overview]
Message-ID: <aRYE_Z-x_RUKkqUS@arm.com> (raw)
In-Reply-To: <044a6526-d6e8-4ae0-9279-8cc42bff5aa0@arm.com>
On Thu, Nov 06, 2025 at 07:29:55AM +0530, Anshuman Khandual wrote:
> On 05/11/25 10:33 PM, Will Deacon wrote:
> > So my question is, would such a user compile today? If not, then your
> > patch is pointless.
>
> The point is this macro is not visible outside #ifdef PGTBALE_LEVELS > 4
> where as similar ones such as p4d_page_paddr() and pud_page_paddr() are
> always visible via their respective fallback stubs, when PGTABLE_LEVELS
> are lower.
Yes but we needed the p4d/pud fallbacks to be able to use them in
functions like early_fixmap_init_pud() without #ifdefs. We don't have
such a case for pgd_page_paddr(), so I don't think this patch makes
sense on its own.
--
Catalin
prev parent reply other threads:[~2025-11-13 16:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-14 11:06 [PATCH] arm64/mm: Add a fallback stub for pgd_page_paddr() Anshuman Khandual
2025-11-04 14:31 ` Will Deacon
2025-11-05 2:54 ` Anshuman Khandual
2025-11-05 17:03 ` Will Deacon
2025-11-06 1:59 ` Anshuman Khandual
2025-11-13 16:19 ` Catalin Marinas [this message]
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