From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f172.google.com (mail-dy1-f172.google.com [74.125.82.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1DB1D347FC8 for ; Mon, 22 Jun 2026 19:03:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782155036; cv=none; b=t7lkYsC9uM4SmOLmh9XxrEyK2RkWPKB5BRdn5iVF//sl3s0ONOIsgcm2sngosXAzUHliaoHUKk/5T4GkzfiGlnrkKmb7TrsA12dvcXpQEzP1jBSwIKLPl3hHtLVrBYlWrKEeJ6fY73uocbmDuKDMHKu0N0wAKdE2Aw+4Zv2jmGM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782155036; c=relaxed/simple; bh=uM6rjwv+rWrcNEl8KjTKnVcDSG3oUNpsPUMqnFOcLeE=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=PdhP0mbb7Bt6kl/eOrcP/054iSE/N1T3otV7WefP3qpblwzbs6r0eoInL4pWnQ4N0l2/RsU2Rl9Xde+HiW5/cscOLm7KkDVyOu/dw7mJuQSiG7JHKg5mBdaGyis4utNUTe3jo+JEPCEPkekS1edQpO0XxTrhaTCRSx1QWV37lsk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=LFiZE21b; arc=none smtp.client-ip=74.125.82.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LFiZE21b" Received: by mail-dy1-f172.google.com with SMTP id 5a478bee46e88-30c0a352e33so197591eec.0 for ; Mon, 22 Jun 2026 12:03:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1782155033; x=1782759833; darn=vger.kernel.org; h=mime-version:user-agent:content-transfer-encoding:references :in-reply-to:date:cc:to:from:subject:message-id:from:to:cc:subject :date:message-id:reply-to; bh=uM6rjwv+rWrcNEl8KjTKnVcDSG3oUNpsPUMqnFOcLeE=; b=LFiZE21bJOd27mvhUeQY65zQorGfroSNylZhnl5pr3qjxqG/eN1p6cReYMi7Y8XHb0 7P2yUKScTc7SL9KBMwdl8WT1nEKnGZf9ur45NKJJuEmRNsVr4TarSwghnJCBC39U5FT/ hbLMbAuZB7Uhid7P768tqQ5oB5rNa0UgEghjqL8I6E/OiecFdkW7XXJUCVzAvM2Bcvqj aAAg70ofC8G+A3+uW7Vx2nk3e0tc12ATFJvEbWA6+4EjPe4CrUqJXP2Emg2HT57KZ67b LsX6aiKqdjYFThFXLMKvM5eHENHiOf+kS4D8rdkQabgcObx3aWN/R9FVWrU0LGgqTlRe mYGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782155033; x=1782759833; h=mime-version:user-agent:content-transfer-encoding:references :in-reply-to:date:cc:to:from:subject:message-id:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=uM6rjwv+rWrcNEl8KjTKnVcDSG3oUNpsPUMqnFOcLeE=; b=Hwey1SEsx2NttTOOjlLN+4gcxM905X3/027ETLdrpMLfw0fQEDJGxW6SnpjIMGoZce +YQZ3c0XpBl1bnMa0v4qny+XtQm4cQqJrvdxx07KvuY0+922XmbPVmBHlmOEY4Xu2HO5 rc2hzC7Kcsg3dCHYJX1Bk9mRd2kVj+4u3UZLSWhT//N+WsPbWgW58LaJklLs9T/5mgDJ imBW/xPtgfK/wWztNZqZ2Le6ntNMhuc/0BiIDtfYDZj2mmkgCNnKzm68azqVLwQHfzjN 76MgS2wthz/PPHYrCMbx47w8rdiA9lkSyDptgOuXJQ89J+vp8fORyenc5LVEOLxY7NyX cYRw== X-Forwarded-Encrypted: i=1; AHgh+Rof1NdYYIHlV+Nno9ky+TSaXzonkfC6aK7ieu/kTLEerKKOGs5e7RebigVBtEUBPVan4p5CsaiM1OJ71YtzVo8Uohk=@vger.kernel.org X-Gm-Message-State: AOJu0YztH/v64DFBav0r2CqKJtvUE1v11n1KHvYxATF7vrkCipC9Qfum 5vezM8ty7PVQWrnpy+uoImu/fIkSX/A9TPg0v702dlJ/Szdc2EKw+48j X-Gm-Gg: AfdE7cloj+hK9dglxgYl2NTq0NiFqjXoOCPMo4naDtQIGdkxGtak4L6vzC4aff80w35 31dym0vnUmyyKSLh/y3OosHCptrgS8kJiOq+8HG5zgRZME/VHcee1RVc2atPVuQZ6FABRmT+3Vu GyUrrapQOnGYNoaKnMtDgrFyklll0t2iO432JdC/JtYzTonV+mLVvgD27V7RckPIFsgNvom5Ef8 79sr11QSK+2wi6S8sPJCIQfgsGq8ua5qggDgDK3CKKhG9FgogormXYnJnKeDHo0VujUAuSdUXYo /pGHUvcHpC2UCOxIIDeNZWWnV0yqGmKwO+w9Zva+WpnPhwbrZnULI4VKgqRqrtZU3ir6NX39Gzd pba2aMxRDzomvnmxy4SSDXRuPOcRDa+ajBetWUODBibUXxbNcWk46HgBuAWitiZaBJQlo/mzCLZ nNFFPlSDaZmXe2n3lI0pmiIb1888A+MaFwFW1KfBRVcZx2M2rEtkzhpVwTeWwBp0Y+fhk= X-Received: by 2002:a05:693c:2887:b0:30b:cc4e:6396 with SMTP id 5a478bee46e88-30c5553b105mr382073eec.7.1782155033135; Mon, 22 Jun 2026 12:03:53 -0700 (PDT) Received: from ?IPv6:2a03:83e0:115c:1:6e2:c699:67c:63fe? ([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) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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. [...]