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([2620:10d:c090:500::1:5387]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-30c1be4967fsm10549199eec.26.2026.06.22.12.03.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Jun 2026 12:03:52 -0700 (PDT) Message-ID: <1979fc81ae7bdaabda8616cd9698a40ef8bbfaee.camel@gmail.com> Subject: Re: [PATCH v3 5/7] kernel: Use mutable list iterators From: Eduard Zingerman To: Kaitao Cheng , Paul Moore , Eric Paris , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Kumar Kartikeya Dwivedi , "David S. Miller" , Jakub Kicinski , Jesper Dangaard Brouer , John Fastabend , Tejun Heo , Johannes Weiner , Michal =?ISO-8859-1?Q?Koutn=FD?= , Maarten Lankhorst , Maxime Ripard , Natalie Vock , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Masami Hiramatsu , Oleg Nesterov , Peter Oberparleiter , Andrew Morton , Baoquan He , Mike Rapoport , Pasha Tatashin , Pratyush Yadav , Naveen N Rao , Josh Poimboeuf , Jiri Kosina , Miroslav Benes , Petr Mladek , Will Deacon , Boqun Feng , Luis Chamberlain , Petr Pavlu , Daniel Gomez , Sami Tolvanen , Steffen Klassert , Daniel Jordan , "Rafael J. Wysocki" , Davidlohr Bueso , "Paul E. McKenney" , Josh Triplett , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Uladzislau Rezki , Juri Lelli , Vincent Guittot , Kees Cook , Balbir Singh , Anna-Maria Behnsen , Thomas Gleixner , John Stultz , KP Singh , Matt Bobrowski , Nathan Chancellor , Martin KaFai Lau , Song Liu , Mark Rutland , Mathieu Desnoyers , Dietmar Eggemann , David Vernet , Steven Rostedt Cc: audit@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, cgroups@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-perf-users@vger.kernel.org, linux-trace-kernel@vger.kernel.org, kexec@lists.infradead.org, live-patching@vger.kernel.org, linux-modules@vger.kernel.org, linux-crypto@vger.kernel.org, linux-pm@vger.kernel.org, rcu@vger.kernel.org, sched-ext@lists.linux.dev, llvm@lists.linux.dev, Kaitao Cheng Date: Mon, 22 Jun 2026 12:03:46 -0700 In-Reply-To: <20260622042811.31684-1-kaitao.cheng@linux.dev> References: <20260622040533.29824-1-kaitao.cheng@linux.dev> <20260622042811.31684-1-kaitao.cheng@linux.dev> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.60.1 (3.60.1-1.fc44) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260622_120354_590925_341C86D2 X-CRM114-Status: GOOD ( 16.42 ) X-Mailman-Approved-At: Sat, 15 Aug 2026 00:45:40 -0700 X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On Mon, 2026-06-22 at 12:28 +0800, Kaitao Cheng wrote: > From: Kaitao Cheng >=20 > The safe list iteration helpers require callers to provide a temporary > cursor even when the cursor is only used internally by the loop. This > leaves many functions with otherwise unused variables whose only purpose > is to satisfy the old iterator interface. >=20 > Use the mutable list iteration helpers for those cases. The mutable > helpers keep the same removal-safe traversal semantics, while allowing > the temporary cursor to be internal to the macro when the caller does > not need to observe it. >=20 > Convert list, hlist and llist users under kernel/ where the temporary > cursor is not used outside the iteration. Keep the explicit cursor form > where the next entry is still needed by the surrounding code. >=20 > No functional change intended. >=20 > Signed-off-by: Kaitao Cheng > --- Beside the fact that this does not apply, I don't see a reason why is this needed for BPF sub-tree. [...]