linux-kernel - Re: [v2 PATCH] arm64: mm: make linear mapping permission update more robust for patial range

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Message-ID: <176306032241.2459767.8275191874359460210.b4-ty@arm.com>
Date: Thu, 13 Nov 2025 18:59:18 +0000
From: Catalin Marinas <cmarinas@...nel.org>
To: ryan.roberts@....com,
	dev.jain@....com,
	cl@...two.org,
	will@...nel.org,
	Yang Shi <yang@...amperecomputing.com>
Cc: Catalin Marinas <catalin.marinas@....com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [v2 PATCH] arm64: mm: make linear mapping permission update more robust for patial range

From: Catalin Marinas <catalin.marinas@....com>

On Thu, 23 Oct 2025 13:44:28 -0700, Yang Shi wrote:
> The commit fcf8dda8cc48 ("arm64: pageattr: Explicitly bail out when changing
> permissions for vmalloc_huge mappings") made permission update for
> partial range more robust. But the linear mapping permission update
> still assumes update the whole range by iterating from the first page
> all the way to the last page of the area.
> 
> Make it more robust by updating the linear mapping permission from the
> page mapped by start address, and update the number of numpages.
> 
> [...]

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

[1/1] arm64: mm: make linear mapping permission update more robust for patial range
      https://git.kernel.org/arm64/c/37cb0aab9068

-- 
Catalin