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Mon, 02 Mar 2026 09:18:47 -0800 (PST) Received: from localhost ([2603:7000:c00:3a00:365a:60ff:fe62:ff29]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-89a083a95fbsm982926d6.38.2026.03.02.09.18.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Mar 2026 09:18:46 -0800 (PST) Date: Mon, 2 Mar 2026 12:18:45 -0500 From: Johannes Weiner To: Vlastimil Babka Cc: Andrew Morton , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Zi Yan , Mel Gorman , Matthew Wilcox , "David Hildenbrand (Arm)" , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev Subject: Re: [PATCH 3/3] mm/page_alloc: remove pcpu_spin_* wrappers Message-ID: References: <20260227-b4-pcp-locking-cleanup-v1-0-f7e22e603447@kernel.org> <20260227-b4-pcp-locking-cleanup-v1-3-f7e22e603447@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260227-b4-pcp-locking-cleanup-v1-3-f7e22e603447@kernel.org> X-Stat-Signature: 1nzotcqwopopwyx3gf6umc1j18wnukhk X-Rspamd-Server: rspam09 X-Rspam-User: X-Rspamd-Queue-Id: 76143A0013 X-HE-Tag: 1772471928-419665 X-HE-Meta: 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 V2/TQdyx 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Feb 27, 2026 at 06:08:00PM +0100, Vlastimil Babka wrote: > We only ever use pcpu_spin_trylock()/unlock() with struct per_cpu_pages > so refactor the helpers to remove the generic layer. > > No functional change intended. > > Suggested-by: Matthew Wilcox > Signed-off-by: Vlastimil Babka (SUSE) Acked-by: Johannes Weiner