From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dl2-f43.google.com (mail-dl2-f43.google.com [74.125.229.171]) (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 EF952353A6F for ; Sun, 27 Sep 2026 13:54:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.229.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790517259; cv=none; b=XLPUAaiBxCHJQM90Uy7X4TDbhh+Y1MhFikcmmIIxbrW5t5IkaQKnzWHhw26QZJcAJao0ZHkEuWAUJXy3jBLjqdXGF1UmgZI/o/f+sgQqSmGjGovoerFSgcqd8F9xKmt+8nPH3tmCqvUTy6DrTeDeQQkSx+V8ZYcLdeXO+S/0MmM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790517259; c=relaxed/simple; bh=PM8dkF+8etKed18lFD/2Y9REotHc2O/UVajZjOn2QyI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=T1t2tVR9zB2YSQy7sgTGKePNQv+4CILsG/2jybP757BDsSWh8tKM1tYAy44PpTHmHICCnvGvN9i9c2D8jzuDi+m+v7q4PrPN60Y+QK8v1jfdn3jervHokUjPIhGL2UvkTfDiOM33MbLWnzQOqpiIYZTPr3/H//7z/9mq2dqzAaI= 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=bQP83zJb; arc=none smtp.client-ip=74.125.229.171 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="bQP83zJb" Received: by mail-dl2-f43.google.com with SMTP id a92af1059eb24-144fa6e60bcso90215c88.0 for ; Sun, 27 Sep 2026 06:54:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1790517257; x=1791122057; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=Ew/cE3p4ZACR2ABiKyvZI7K2codxGXMvh85xvLtScaU=; b=bQP83zJbvaHRkpOsgalkPL0RtTKuzVo9zZ6I4TMt4XnLdggSZQ1Q9qCqgaVW3Pvzra PzB8Zv++CIWn7gk4LZFDoaY1fcGgdMU8fpGVsQEBdUs4qGuiwzfoSanfNEhju/BG4LYu ezEc2R9KMXdHzfRRsZujNO1VluNgeeU4R72jQjA93ojagmjnnVO3zliMcAz21N3QtHIx 7DyXmb1NQKxayxGXrQw+OzXIMRmNTgkTEAKGqXTkWCzYeeMb4KkmAeUvME6Jd0EBqAaX BpXsMJi5aoZQo4kiWQKaYQqn4dsqJQlWym2sQy+w+q0hl8IEbAh3asvnAxJY3QaL8wqy Yw/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790517257; x=1791122057; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=Ew/cE3p4ZACR2ABiKyvZI7K2codxGXMvh85xvLtScaU=; b=IBpa3XvxVyiQHRdEOWhi00aOEdAXLMEvJ9EvCO2BeMpn12nvUkYWNtkTp9T7quzWgm +6dlEz82s5s/SouJMnO7AaHT6++IrjpTzjgb7mRuSQsEYiBHVRR7qFhBQtKJZHJb9E6/ H4O6BI0B6AYSYdVcqYcn41x5Cxyv6+Uxfeh82OLcoWHXXsQ5Knnnk/zEdEFj2BqI+l5i /wLVsWsZCnBlcUn2+NHlVBQFvRQqY3r8XYL6Ot6UOk7npr7VEc++V7UnOj0TRX7MICb/ ZABdLLxSVoUB/OULKv+uzsS0gEKPoZbqMH+G4QoCnd9kjwLoidj5QMJU/e4LXLnD7E4w zgCA== X-Forwarded-Encrypted: i=1; AKwUvBy6tBA6OoOWbv2c5KSVbtYiIDIXeHmXOu5WZMuyEnAq/asVbEc5NePGVmwpHOamoCIrkdCz4XfgFLq8hH8=@vger.kernel.org X-Gm-Message-State: AFuF++lU8XzaYFgbJY3QNXFK8oUXnDFXnHBM+POB90yiHOG4+6NeLXFy dC9kxMLPlX2a2eoGhfuzYMBBXT4Mk4L1kGjkBojfB+xfzJejI3Wc6JUA X-Gm-Gg: AYBFou0yzjoqkzcfKATdNx3Zkm+r9y2qEDlWILZUETxU9d7pOfS0RpUsmD/LlN8t+Vd gR8xs2nC0JW7FP0Jq8D6mvJtowdq0JPAToBkRh1/7nuQdzHelXkNXCTeK1fyZcgYFf991HTxIR3 s1be+4IG/5SDv82HT6YIBPtkgFtomsiyNOLGq3oVl8QkgiuSlSYAdc/929IZTcT2m8QG3gDniGt FlzRp3SUUjyORX2hqtuaZoqoD7yY08X8PeMPKGq5cdlVi2BAZDefxS4VmqwOfTKYES1SPg/25ub 4qaWA0YzFAfxoSmDZKMb480SxBWBLdJxhdmGaXNh6fQLNpFliq4DQsvFoPO0MTQh6iI2C61le0n Mv3oeB9vVF6CiCkMcNlRmyJkQcq9+kvmXGmfeGef/84a0rla/y8YCyqkNo3RrNESgpBLT71Vlkr lQQBFJBXYx2Lw0fUhy8r/2Y9nr53trgMOpIDmJ0HA8nIe8tsmdXiP6cdIoUFWXpoxKen7wrnWSY WIpuFet1StGYIGEAk1etgkQsbEN3NyaCkwIFjOeTjMGDXuQZ2FwG68yq/zEipcCNoqztXwQ30AQ +VN4 X-Received: by 2002:a05:701b:4508:20b0:144:ff51:2d73 with SMTP id a92af1059eb24-146cfbd49d8mr9558498c88.2.1790517256737; Sun, 27 Sep 2026 06:54:16 -0700 (PDT) Received: from localhost.localdomain (95.169.12.199.16clouds.com. [95.169.12.199]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-145ad4028a9sm16386411c88.11.2026.09.27.06.54.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 27 Sep 2026 06:54:16 -0700 (PDT) From: Chengfeng Ye To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Chengfeng Ye Subject: [PATCH net-next v2] net: pktgen: return bool from __pktgen_NN_threads() Date: Sun, 27 Sep 2026 21:54:05 +0800 Message-ID: <20260927135406.3969970-1-nicoyip.dev@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Callers of __pktgen_NN_threads() only check whether a pktgen_dev was found. Returning the pointer exposes it outside the helper even though neither caller uses the object itself. Return bool instead and keep the pktgen_dev pointer internal to the helper. Suggested-by: Paolo Abeni Signed-off-by: Chengfeng Ye --- Changes in v2: - Rebase directly onto the current net-next tree, independently of the deferred RCU lifetime fix. - Update the commit message for the current helper implementation. Link: https://lore.kernel.org/netdev/20260825185313.239861-1-nicoyip.dev@gmail.com/ [v1] --- net/core/pktgen.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/net/core/pktgen.c b/net/core/pktgen.c index 7f81aed46672..a89cb0760821 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -2024,11 +2024,11 @@ static const struct proc_ops pktgen_thread_proc_ops = { }; /* Think find or remove for NN */ -static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, - const char *ifname, int remove) +static bool __pktgen_NN_threads(const struct pktgen_net *pn, + const char *ifname, int remove) { struct pktgen_thread *t; - struct pktgen_dev *pkt_dev = NULL; + struct pktgen_dev *pkt_dev; bool exact = (remove == FIND); list_for_each_entry(t, &pn->pktgen_threads, th_list) { @@ -2038,10 +2038,10 @@ static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, pkt_dev->removal_mark = 1; t->control |= T_REMDEV; } - break; + return true; } } - return pkt_dev; + return false; } /* @@ -2049,7 +2049,6 @@ static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn, */ static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) { - struct pktgen_dev *pkt_dev = NULL; const int max_tries = 10, msec_per_try = 125; int i = 0; @@ -2058,8 +2057,7 @@ static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname) while (1) { - pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE); - if (pkt_dev == NULL) + if (!__pktgen_NN_threads(pn, ifname, REMOVE)) break; /* success */ mutex_unlock(&pktgen_thread_lock); @@ -3835,8 +3833,7 @@ static int pktgen_add_device(struct pktgen_thread *t, const char *ifname) /* We don't allow a device to be on several threads */ - pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND); - if (pkt_dev) { + if (__pktgen_NN_threads(t->net, ifname, FIND)) { pr_err("ERROR: interface already used\n"); return -EBUSY; } -- 2.43.0