From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DCCFC47D95E; Tue, 13 Oct 2026 02:36:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791859001; cv=none; b=MkCrk4SWG1E2pmZd+g+Q9PibTZauTD1urnqxjgt0CwAkmud4aK/+k9IcrbGcxccRN54To3XernWnC5OhJzp7RsN4dmGR9bHXyq+bSkiywfY7jYYWd7ZH0FLqhdIBUvyDDOg+Ueea945q+fBW5iZdQZVqp7sYUtvOFtVUAgG1Adw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791859001; c=relaxed/simple; bh=AU/DwvulqIXGLDe/+nTi2/ex4kbr3buY81VVuUnBnJA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=LRMui03vMCATxDCT8jpFDeahNFaISV+pTxnX3J4kIQX+YRwrQ+DcPm1MleGS60nGw9a1NS5hZE3nlIYAPwbaladfKtp9jEwllsBvoCajTGdTmwXGlOWMoMPTCRTKBxRGpb6v/BXdzNiTeelvzUeVSNxFfbmZeZOEe11j2kQZf8Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sKQsjNj+; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="sKQsjNj+" Received: by smtp.kernel.org (Postfix) with ESMTPS id B9A95C2BCFD; Tue, 13 Oct 2026 02:36:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1791859000; bh=AU/DwvulqIXGLDe/+nTi2/ex4kbr3buY81VVuUnBnJA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=sKQsjNj+Dob3pm3dSnkFzHizLFIHjMd4e8BWrRFSmYa7vqaCpYd1e6k69nXco5NVl SySfQi72U9xWrprnn88nwuKbMkJ7OemEgQmWxQf02IzA1PV3f9E7wNIKWSTeOp7B+S WZhbBohxsCyObi3NP5zVjMO5W9uVzy6onHXp4/Kn6Hsi9NmWQxnMk91B+4rbxSNgYz gt83utHj2JHye3aGNn06yf7J0aQ1gmu7FXh5vtnBH3Hplos4XyZ57Ws8GxQeumyrl/ 5NMBRSSAxYtyTeXeGzIJkupIJrpsQvOsPNx3Xl6dAfhWYxXuaVo3Q8trpRTdA48GZm 5bqQFgfl/HRAg== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id A70ABCC6B09; Tue, 13 Oct 2026 02:36:40 +0000 (UTC) From: Jim Cromie via B4 Relay Date: Mon, 12 Oct 2026 20:37:05 -0600 Subject: [PATCH v12 34/40] dyndbg: add epilogue to dynamic_debug/control file Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261012-dd-cmap-part2-clean-v12-34-3c8cc5725def@gmail.com> References: <20261012-dd-cmap-part2-clean-v12-0-3c8cc5725def@gmail.com> In-Reply-To: <20261012-dd-cmap-part2-clean-v12-0-3c8cc5725def@gmail.com> To: Jason Baron , Shuah Khan , Andrew Morton , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Arnd Bergmann , Luis Chamberlain , Petr Pavlu , Daniel Gomez , Sami Tolvanen , Aaron Tomlin , Jonathan Corbet , Greg Kroah-Hartman , Nathan Chancellor , Nicolas Schier , Shuah Khan , Randy Dunlap , "Rafael J. Wysocki" , Pavel Machek , Len Brown , Jonathan Corbet , Petr Mladek , Steven Rostedt , John Ogness , Sergey Senozhatsky , =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arch@vger.kernel.org, linux-modules@vger.kernel.org, linux-doc@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-pm@vger.kernel.org, Jim Cromie X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1791858995; l=2252; i=jim.cromie@gmail.com; s=20260203; h=from:subject:message-id; bh=V9XIK1iVmGPQhMBcQ7oh5zL/IVhph4cS5i0ugL5KcBY=; b=8iP/LNq7zNltMSUZlq4aqfiX8bvTfNKdQ1A5FalGkdKfJM9MDW6ZED5BLfCa0R69M1ZVMVrVI qj4fk+Ysfz4DJUCIOTrZXPBJfogswPhf43y7kkwAL3J5WjUafUJmgGB X-Developer-Key: i=jim.cromie@gmail.com; a=ed25519; pk=C6E5ODlPQo7ZBynATXH9wg7K6HxP0pIXyf4s38Qw0XE= X-Endpoint-Received: by B4 Relay for jim.cromie@gmail.com/20260203 with auth_id=958 X-Original-From: Jim Cromie Reply-To: jim.cromie@gmail.com From: Jim Cromie Add an epilogue to the control-file, to allow display of statistics etc, without disturbing the header. NB: epilogue lines should start with "#: " to distinguish them from lines describing pr_debugs (and from the header line). No new lines are added here, only the place to do so. Signed-off-by: Jim Cromie --- v9: . update ddebug_proc_start() to return EPILOGUE_TOKEN when seeking directly to epilogue. --- lib/dynamic_debug.c | 23 ++++++++++++++++++++--- 1 file changed, 20 insertions(+), 3 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index f6e94a2ef346..efde85c7a9c1 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -1182,6 +1182,9 @@ static struct _ddebug *ddebug_iter_next(struct ddebug_iter *iter) * read() call from userspace. Takes the ddebug_lock and * seeks the seq_file's iterator to the given position. */ +static char ddebug_epilogue_token; +#define EPILOGUE_TOKEN (&ddebug_epilogue_token) + static void *ddebug_proc_start(struct seq_file *m, loff_t *pos) { struct ddebug_iter *iter = m->private; @@ -1197,7 +1200,9 @@ static void *ddebug_proc_start(struct seq_file *m, loff_t *pos) dp = ddebug_iter_first(iter); while (dp != NULL && --n > 0) dp = ddebug_iter_next(iter); - return dp; + if (dp) + return dp; + return n <= 1 ? EPILOGUE_TOKEN : NULL; } /* @@ -1210,12 +1215,20 @@ static void *ddebug_proc_next(struct seq_file *m, void *p, loff_t *pos) struct ddebug_iter *iter = m->private; struct _ddebug *dp; + (*pos)++; + + if (p == EPILOGUE_TOKEN) + return NULL; + if (p == SEQ_START_TOKEN) dp = ddebug_iter_first(iter); else dp = ddebug_iter_next(iter); - ++*pos; - return dp; + + if (dp) + return dp; + + return EPILOGUE_TOKEN; } static bool ddebug_class_map_in_range(const int class_id, const struct ddebug_class_map *map) @@ -1267,6 +1280,10 @@ static int ddebug_proc_show(struct seq_file *m, void *p) "# filename:lineno [module]function flags format\n"); return 0; } + if (p == EPILOGUE_TOKEN) { + /* use this soon */ + return 0; + } seq_printf(m, "%s:%u [%s]%s =%s \"", trim_prefix(dp->filename), dp->lineno, -- 2.56.0