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AJvYcCWVzBqsTx9GOq5k/xGdptC7gMskFATCA0CLN3QPNK6Skx5ICPHLwOIVIplW+eOjPHesePJCbOaKoQ==@kvack.org X-Gm-Message-State: AOJu0YwbUcJtK92yYhy4nO6l5CgJkXJHBWMrjtF+S0Cl3sI0w90ItY9/ 9vSu7mPejqtiXwjtgiC88JhEJhrtpfgvtxE+otZDbQVCL6xCIVgWJsRXeGe0eA== X-Google-Smtp-Source: AGHT+IFZuEPBZGMBb6yILvpuGoLBRTg0zQfGWndE1JjdQ9u9RIGWwrmtLSM5wwVtRT+ilMvEG3tiNQ== X-Received: by 2002:a05:6214:598f:b0:6cb:2d18:dfe5 with SMTP id 6a1803df08f44-6cb3b65a8femr120236206d6.49.1727625059122; Sun, 29 Sep 2024 08:50:59 -0700 (PDT) Received: from rowland.harvard.edu ([2601:19b:681:fd10::abbf]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6cb3b5ffbbesm31867626d6.25.2024.09.29.08.50.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 29 Sep 2024 08:50:58 -0700 (PDT) Date: Sun, 29 Sep 2024 11:50:52 -0400 From: Alan Stern To: Mathieu Desnoyers Cc: Linus Torvalds , linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Sebastian Andrzej Siewior , "Paul E. McKenney" , Will Deacon , Peter Zijlstra , Boqun Feng , John Stultz , Neeraj Upadhyay , Frederic Weisbecker , Joel Fernandes , Josh Triplett , Uladzislau Rezki , Steven Rostedt , Lai Jiangshan , Zqiang , Ingo Molnar , Waiman Long , Mark Rutland , Thomas Gleixner , Vlastimil Babka , maged.michael@gmail.com, Mateusz Guzik , Gary Guo , Jonas Oberhauser , rcu@vger.kernel.org, linux-mm@kvack.org, lkmm@lists.linux.dev, Nikita Popov , llvm@lists.linux.dev Subject: Re: [PATCH v1 0/2] Introduce ptr_eq() to preserve address dependency Message-ID: References: <20240929111608.1016757-1-mathieu.desnoyers@efficios.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240929111608.1016757-1-mathieu.desnoyers@efficios.com> X-Rspam-User: X-Stat-Signature: ue897wbwwmahod6wjn6w5ckyycsym8zj X-Rspamd-Queue-Id: 3C0DC1C000A X-Rspamd-Server: rspam02 X-HE-Tag: 1727625060-345500 X-HE-Meta: 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 e6TOvlJ4 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sun, Sep 29, 2024 at 07:16:06AM -0400, Mathieu Desnoyers wrote: > Introduce ptr_eq() to compare two addresses while preserving the address > dependencies for later use of the address. It should be used when > comparing an address returned by rcu_dereference(). Both patches are now much better. Thank you. Acked-by: Alan Stern Alan Stern