From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lf1-f43.google.com (mail-lf1-f43.google.com [209.85.167.43]) (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 E8B721C28E for ; Wed, 1 Oct 2025 07:15:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759302928; cv=none; b=WkjtftQbg4ckAKbsFOXCD3ZxTAJz+P8elLZrYoWqQaKOrOWnKdAC7bsjYerL2QVG2vNRwCTsxzVexRc7txerckgNs8zQzCEmUkIN0s/BmKOo3tK8W3YbHyWy2/ZsKtRgsnJ5phk/tuX+3XViHJqZN1RfiG3q22yAvbuzOOzP78Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759302928; c=relaxed/simple; bh=KLOUoFvpz3+9Daoni/vqhIeATvg32tx7vSxzv4KrSWY=; h=MIME-Version:References:In-Reply-To:From:Date:Message-ID:Subject: To:Cc:Content-Type; b=UXLjqJZ27hQcDSYWoXw9GG2gwPbMaJ8ZJTYvCZsIk6ViG2cg7D3YOwGNpVgW+OSMHJrtJszpTEs8wOXcOLGJ7pjjjCp5U2uBjhINoJ92ka5K3DTS8WuSTBJ6T4HksInk5zie8CDfBnhYJ3SJWwBl4UcYumlUoV7sWwA+19DZXGA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=UIJgm6gp; arc=none smtp.client-ip=209.85.167.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="UIJgm6gp" Received: by mail-lf1-f43.google.com with SMTP id 2adb3069b0e04-57a604fecb4so8293342e87.1 for ; Wed, 01 Oct 2025 00:15:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1759302925; x=1759907725; darn=vger.kernel.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=KLOUoFvpz3+9Daoni/vqhIeATvg32tx7vSxzv4KrSWY=; b=UIJgm6gpqR34LrvO/Dnj6u1em273Fm2u6GtLGUY8LhyHf1KS8uDKPhLqBOwpfwOyty ZA0GI3gBCxNltJ0BT3FQduz0l28HOB5UVptyO5oJ4bbf6DZB9a9SxkOuavPJ3+RCIpgQ Vll6meLlYM624OFqPCiqq/gGTiZKjxl253JGjjiCcYS8j3XrxgiUAQNFkokroqhReDHl XpxxkHxSI/xtCgkQYsooR4gdtWm5uBHNvD0cwzNM3YUEfmEPrc6S176Lob/zf5IaHdVY 8NwO2xL/+oYA3+m3Yudp4mbHp/Jqf9ZOw96yQRpq37I0+TlCe6fe3NHhpexVrB1H/3v+ 57jQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1759302925; x=1759907725; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=KLOUoFvpz3+9Daoni/vqhIeATvg32tx7vSxzv4KrSWY=; b=CcC4hLMICT1mFZ+dMv8YoUL/kmYcVJpdS3033huOZJz0F4t85ozuGQ+pcPnW8pREC/ 9Ixgi3ZLZqEP9gqzaIBB0wLraRvIpfm9I9qd9gtCUn/odWQd+PqELOuMCQOt78fLwPvP sENRA8lALbFavZeBJwSIV3CBEu6ybZ86bBAoYs9S7vZc4kX68Mat4iIChbh9BfItoD0g cqPrY9HhnR6F1g7vZ6I2Dv6NCul65l0zn1V4ze9twx6AjgcS4oJJ9G9nFKWsaShGOLWg tY0QYcTb6q1qYrCiAW02BhfjK+HSvcCAPStxjuBuRrXOgPci3JBbWLn/B2NfkPb1IMe9 6Brw== X-Forwarded-Encrypted: i=1; AJvYcCU+1tNnjfIMHmlUAWPkgvif/0pg/3j0EKVlMhf0uP3ciO5Xs0W5rMr76nVQkQMFz15jXPP7uhl7xUIj@vger.kernel.org X-Gm-Message-State: AOJu0YyuSNQWW6YNCFZqQCmEOlD+rHs/jlGWCXfbRiRk0JbJ2gEuPEK3 7X9vDApXNGtg4TBdidZQ6FB5p/iQ3LCZj1JHGbrstcVkbs/PUMmkemKsu4a0whwt3NbsvQdZ+dG ufcI+B9zH+7/c7OciaUomJM/DQ8hGSYDhWqjBO1s7y98vu4Kit0F1I0fprQ== X-Gm-Gg: ASbGnctrCqEhWEh+zm2R6j5QZD7pEdyFBZw6AKV+lFqicbg3N/Wn204/JDu/cxWzBwe 9MlaqzH1mmQIv/Z9zAH3u4DY0OITRflZNHsqGNnnW/M99vCxlfVUOV+yyluqM2m2PGyGzsb9H15 20zkVWGgr9dCbj5vCiGjIvu80QZm1gYgLbf5mc1hIhaWssEoPS5BTJkVEsKxwjXKbUt3MxivbZL Sil0yXn4D5l2VbtBfzRZ/xEuFoVdFo= X-Google-Smtp-Source: AGHT+IEnqFN8uRHySmhyFBckr+4qfapD0oIDbjAXJpBIKMb/6cpABxlfPjflIdUDyU81H5zIY7PLLDU9mAVEsotGkaw= X-Received: by 2002:a05:6512:1319:b0:560:8b86:75ba with SMTP id 2adb3069b0e04-58af9f755c8mr685869e87.52.1759302924877; Wed, 01 Oct 2025 00:15:24 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20250923133304.273529-1-mstrodl@csh.rit.edu> <20250923133304.273529-2-mstrodl@csh.rit.edu> In-Reply-To: <20250923133304.273529-2-mstrodl@csh.rit.edu> From: Linus Walleij Date: Wed, 1 Oct 2025 09:15:14 +0200 X-Gm-Features: AS18NWATFpTIxuKt6TOYxlvCdRwC0-rKJPWCBiTCdTUgjY_Zw5e5ezG3W3zJtXc Message-ID: Subject: Re: [PATCH v2 1/3] gpio: mpsse: use rcu to ensure worker is torn down To: Mary Strodl Cc: linux-kernel@vger.kernel.org, brgl@bgdev.pl, linux-gpio@vger.kernel.org, "Paul E. McKenney" , Tzung-Bi Shih Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, Sep 23, 2025 at 3:35=E2=80=AFPM Mary Strodl w= rote: > When an IRQ worker is running, unplugging the device would cause a > crash. The sealevel hardware this driver was written for was not > hotpluggable, so I never realized it. > > This change uses RCU to create a list of workers, which it tears down on > disconnect. > > Signed-off-by: Mary Strodl Oh this RCU thing is a bit terse and a lot of code. Can you look if you can use the new revocable resource management API? It uses RCU underneath. https://lwn.net/Articles/1038523/ Yours, Linus Walleij