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 D80B5349CD8; Wed, 9 Sep 2026 00:55:04 +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=1788915304; cv=none; b=ApDj1PigeF9cdJhty4kXHRZxgkUduEujFvLqA/7FFbXnoWsb1MVFTgVQ7kYbpsdNkGZ2hONKJhVLDdXxQRUGAMZGojzhmRfiPs4o5b0iHnwJR849Fscl1gyWsSodIicRibZ8AG72lWcguui8J8JvXTZIizTYfqFenjOrgdsw6Vw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788915304; c=relaxed/simple; bh=Pu4jFw/n2qmbKY5gxWu8WCu6XgpSwe1vy3HOi4Z4JJM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ShG25gUXlY6RgXknY7XzUXUdFDpVx30beocihfItJYzDPDgon16YNFAJH3sC2arKObiF3mU5V0gRmH9yDzV2byfZTi1F/jZbJAGZCIL36V4EPNCY1qLJ56YSAmFrjcb4ty/S2xz2MjcIfznR3eiHCVuYBN79a63pvrDZk5G0Zck= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bI1lAFB2; 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="bI1lAFB2" Received: by smtp.kernel.org (Postfix) with ESMTPS id B9BD8C2BCFB; Wed, 9 Sep 2026 00:55:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1788915304; bh=Pu4jFw/n2qmbKY5gxWu8WCu6XgpSwe1vy3HOi4Z4JJM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=bI1lAFB2jyoLkpx2YPhyQlqT9X6P6MmuoQCAMpo+vmOoH0u3y8zDYS85XbNQj8RPa ddXPbk1H172MGmWsUJSDj1XlIZi5nVKyRonor3UUeW3pI3tesTEjvMAeoifdRNEkQ3 lUmp5owSmRgOT7EgpiaE5oDFtWh8IhVTnljp9tj52holNFmUhBGPJm2mp5D9bPvR4a ydJWNNxnqScly3urjjhuKmuKDhAJvoXGzcO8DUcgImbmAUt4TO9jRYqGXfpnIrkYAJ C5sQ81fW/j2Omh1e9QL6DYnw0Lfmj5B9iBju1fu54vh4ufoM3WD5eZ8lyxyl7T60RR +WsWM7avPjsCg== 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 A7EB9C79F82; Wed, 9 Sep 2026 00:55:04 +0000 (UTC) From: Jim Cromie via B4 Relay Date: Tue, 08 Sep 2026 18:55:33 -0600 Subject: [PATCH v9 37/39] dyndbg: add epilogue to dynamic_debug/control file Precedence: bulk X-Mailing-List: linux-arch@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: <20260908-dd-cmap-part2-clean-v9-37-3a3f621f4a10@gmail.com> References: <20260908-dd-cmap-part2-clean-v9-0-3a3f621f4a10@gmail.com> In-Reply-To: <20260908-dd-cmap-part2-clean-v9-0-3a3f621f4a10@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 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=1788915300; l=2252; i=jim.cromie@gmail.com; s=20260203; h=from:subject:message-id; bh=oYHWUJL7INC4Y/mX988tAYogU/OZy4J+TTkT4CPamL8=; b=Q+FNT832FBcFf4Lw6LX8mDpUlmsZNcM7Jq9/wT7sgCRBuEXEHUeXKefbiDBE5GXI3iBtxZxDk 0HvnuTmkEBsCGzyEfLqcMVgbEcaJo3OdrgkkGeCi8qxBu5hldwOiTzh 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 afde13a2121f..77976e7b264c 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -1159,6 +1159,9 @@ 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; @@ -1174,7 +1177,9 @@ 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 == 0 ? EPILOGUE_TOKEN : NULL; } /* @@ -1187,12 +1192,20 @@ 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) @@ -1244,6 +1257,10 @@ 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, -- 2.55.0