From nobody Tue Apr 7 22:02:48 2026 Received: from mail-pf1-f171.google.com (mail-pf1-f171.google.com [209.85.210.171]) (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 DC31F3DEFFF for ; Wed, 11 Mar 2026 12:16:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773231401; cv=none; b=UxV6Cy6pPsPleg4YNGY3/queFci+ixmgSAM+y1FhS8EPCUHc2VtgpPrd8NYF9Rqi5xjow/YJT6hhtaN7VIEmt4qJq9idWNCQwA4QkZlSvkid8jw5nLwFOkXlepxeRuuqDAagrj9jw/P5oBwQP1yo3ecMDD8dW5bSRAlt1o7b/A0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773231401; c=relaxed/simple; bh=vIIr03THJBYTb/DG4le386ANTxRBzJD/TkuNIFzBbbA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=k9derJqGg2nrj36O7HRfDUTEXfVvgZqrvccT0B7JjWe1ivul/f3uAyMbJJPNtp0Uns2YmAFn7uFc5iHi1m+CJz0bq4+FGop1CW/e8E35eIOsWWpWshGvOTYm2/DSr19+NWZOU43paHx9eMq6R2QJ6E/Wnm9T92l3rRrsnGB1xjs= 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=YSf4PrMr; arc=none smtp.client-ip=209.85.210.171 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="YSf4PrMr" Received: by mail-pf1-f171.google.com with SMTP id d2e1a72fcca58-829afe24fb5so3351382b3a.0 for ; Wed, 11 Mar 2026 05:16:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1773231398; x=1773836198; 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; bh=w8b3+dFQJmOFN0qdzKY9BzCR9rFLTY9mbUUY2CWBUCc=; b=YSf4PrMrUQEGHgSTYa+Dlj/T8fA4Dran15+CON0mWkPYZvh5OgsQChoIw+ypvIAtzS 4st7YIy5/k8/TRdCwIOeg838gJIbIt/el1Z8AkNpFl9R7fLR6ud0idZMCu7k7UNR1Q5S BK3IpBnz+m20KovtuMI3MInvbi9EU2BOCJ0OvYYc8ChWGxNay2x6fH+TZGyr5oCsm3m2 KTJ0J8x9YpfFREw2qpR1bfIIO0e2yVqiU5O/BKUM1OhD7dyn1ZTbokLHgPFf16kXJXHK v9/ZwtPpkzZFLRN0dKxLSmGxNJS9Ztp6fr+oT2Sw9ZYst40V/+wnZj7rQqzfuJSe9Lua hf5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1773231398; x=1773836198; 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; bh=w8b3+dFQJmOFN0qdzKY9BzCR9rFLTY9mbUUY2CWBUCc=; b=eJRlyi77Gpqz3p3Z0lwgPWO4Q8J8sQB6EV4TRnU6HLxg/xq4I/ivZvL8CJrSUwlnHn B6x7ZA6jSnMjPIcDdxIDyOJBfoZf1f7qrfvFmUkHDVALZJYhiesbrg3cRPiT36jKgcEz qiAYZsS/O3dBfhIHr84FYlRV4QKZgukhelSfK4yeKvPo+NvIeoZXLbtt/f787IaRRGSa PnwmukvAFpCBb9+HEoPO7gbD5X3lUrzFx2Ifs3qCNBIk3X/zOVWWyLxnhoipshF4Est2 U+2bMjqKW+SIdcIHHbbWixRepARJW9XjXqezk52Bz/9kz6d78Q55UoOZFP+hBRC0G9qq q8jQ== X-Forwarded-Encrypted: i=1; AJvYcCVB83lWcNh4vnh9Iq1Lm3sHz5RkENyA3J/12VTbHccbTw0KMDSppeuwLM9fgq18EAXS8vgqk1BOYOKlJ64=@vger.kernel.org X-Gm-Message-State: AOJu0YyLutKxGMnFQoOpS3DdRLXrARYjSbf0e6DczTegklf+c4sMWarR eIedL1qbuXIuaFtCd5fd6nMnQSv6+4bVSkpr2UVolcn1R/PhawOoFQKJ X-Gm-Gg: ATEYQzwEu/D78JR4tswwRG5v8JF4auJwSZ8udd8n5l4yoBHx5nG7xEe3xNrGpYonGZg MzXrBnpVoa8l1Wy+WCs6+kE/IUpNvLSBStY6jYlTY7j3v+Amv5DdT3Y4D7Tj2vl6reW02ZYIFnL vTdI0FJqdhcU9bcL961UQGg2tdzR+iqnPgID4pK+8qhf+v226RsneMNtl9NCdzKFsMJxI5HYEef 56AW25J2aJQpocWIpQMOZvq9bMnefh2dCNLbxd+LvHY8L27AgiSvXjn9veu3KsJ+iz5j1GY3Q3f YUg1slHiHzNhEYPm0N7txf/gTj+Y0th1EawaBX2cHzZCMgcfKOdoyPafKfG5ljDWu+qzlwHV+BA ds84oEzHPLKFGwTkOknNhMxXaCaS25tz67py3p7ez04HnNvWy47cPR98KktX/gPMySNyNhgzZkm MRauvZrS84Z9eb3jxCa8jkFxrwiSQ97dJWPHIR X-Received: by 2002:a05:6a00:3e11:b0:829:883c:1d53 with SMTP id d2e1a72fcca58-829f7089e1amr2181760b3a.31.1773231397977; Wed, 11 Mar 2026 05:16:37 -0700 (PDT) Received: from fedora ([2409:40e5:1170:3c82:c36b:4f46:fd0b:d91e]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-829f6eecc6asm2286294b3a.42.2026.03.11.05.16.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Mar 2026 05:16:31 -0700 (PDT) From: Shubham Chakraborty To: Wim Van Sebroeck , Guenter Roeck , Jonathan Corbet , Shuah Khan , linux-watchdog@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Shubham Chakraborty Subject: [PATCH] docs: watchdog: explain watchdog API options Date: Wed, 11 Mar 2026 17:46:01 +0530 Message-ID: <20260311121602.139967-1-chakrabortyshubham66@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace FIXME comment with proper documentation for WDIOS_DISABLECARD, WDIOS_ENABLECARD, and WDIOS_TEMPPANIC options. Signed-off-by: Shubham Chakraborty Reviewed-by: Guenter Roeck --- Documentation/watchdog/watchdog-api.rst | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/Documentation/watchdog/watchdog-api.rst b/Documentation/watchd= og/watchdog-api.rst index 78e228c272cf..984f7362d5fb 100644 --- a/Documentation/watchdog/watchdog-api.rst +++ b/Documentation/watchdog/watchdog-api.rst @@ -268,4 +268,13 @@ The following options are available: WDIOS_TEMPPANIC Kernel panic on temperature trip =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =20 -[FIXME -- better explanations] +The WDIOS_DISABLECARD option allows you to stop the watchdog timer via +software. Note that this will only work if the "nowayout" module parameter +(or CONFIG_WATCHDOG_NOWAYOUT) is not set. + +The WDIOS_ENABLECARD option turns on the watchdog timer. + +The WDIOS_TEMPPANIC option is used by some drivers (like the pcwd driver) +to trigger a system halt (typically a kernel panic or power off) when the +temperature trip point is reached. This ensures that the system is halted +immediately in case of an overheat condition. --=20 2.53.0