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Date: Tue, 24 Feb 2026 09:48:04 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: linux-arm-kernel@lists.infradead.org,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Ryan Roberts <ryan.roberts@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	David Hildenbrand <david@kernel.org>,
	Mike Rapoport <rppt@kernel.org>,
	Linu Cherian <linu.cherian@arm.com>, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, Ingo Molnar <mingo@redhat.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	linux-perf-users@vger.kernel.org
Subject: Re: [RFC V1 04/16] perf/events: Replace READ_ONCE() with standard
 pgtable accessors
Message-ID: <20260224084804.GU1282955@noisy.programming.kicks-ass.net>
References: <20260224051153.3150613-1-anshuman.khandual@arm.com>
 <20260224051153.3150613-5-anshuman.khandual@arm.com>
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In-Reply-To: <20260224051153.3150613-5-anshuman.khandual@arm.com>

On Tue, Feb 24, 2026 at 10:41:41AM +0530, Anshuman Khandual wrote:
> Replace READ_ONCE() with standard page table accessors i.e pxdp_get() which
> anyways default into READ_ONCE() in cases where platform do not override.

This is a bit silly, no? All of them should always be READ_ONCE(), with
the exception of pte_get() on PAE like scenarios.