linux-kernel - Re: [PATCH] mm/arm64: Drop dead code for pud special bit handling

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Message-Id: <174319246800.4193737.9820754416446268579.b4-ty@arm.com>
Date: Fri, 28 Mar 2025 20:08:06 +0000
From: Catalin Marinas <catalin.marinas@....com>
To: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Peter Xu <peterx@...hat.com>
Cc: Will Deacon <will@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alex Williamson <alex.williamson@...hat.com>,
	Donald Dutile <ddutile@...hat.com>,
	Keith Busch <kbusch@...nel.org>
Subject: Re: [PATCH] mm/arm64: Drop dead code for pud special bit handling

On Thu, 20 Mar 2025 14:34:05 -0400, Peter Xu wrote:
> Keith Busch observed some incorrect macros defined in arm64 code [1].
> 
> It turns out the two lines should never be needed and won't be exposed to
> anyone, because aarch64 doesn't select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD,
> hence ARCH_SUPPORTS_PUD_PFNMAP is always N.  The only archs that support
> THP PUDs so far are x86 and powerpc.
> 
> [...]

Applied to arm64 (for-next/core), thanks!

[1/1] mm/arm64: Drop dead code for pud special bit handling
      https://git.kernel.org/arm64/c/0fff2aa96f6b

-- 
Catalin