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 A182A5427F8; Wed, 16 Sep 2026 15:33:05 +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=1789572785; cv=none; b=bLMxrIrjYklMOaeLXKD/JuTRDWm4sjGxtJns4tf7n+PWe4fA+uyGrnR+Im+Z1dEr3Q4aSx8Iqg43b9VbkTFBrsgLqo8BEGKEkAXRaYYcqWVPPYTlSZAuFcXp9mn0bgcSxBjVIEUDbsqI2I+nZ74Axw/isOc1Hv0migdj2crNhAQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789572785; c=relaxed/simple; bh=qXTRbpJ7ReGwZJ5gYtv8LBnx55PmlIa0iKRgL5OtWxI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=pbrVTfxb7L3wjBxiSLUn/G+2IKCvQyNS4fkymqPjvzADE1YayMLqRrruAArDNTlHMtOOGtsilZWKds7eK2zSOmnlQEhgsOibF82dqMBf8s/FltgtQlr4R/EpmLWvBxusXOOlt3OKt9z8jcoX0pCUgDTlcMttvQ3ZfvBgOxej8Mw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oq092fH/; 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="oq092fH/" Received: by smtp.kernel.org (Postfix) with ESMTPS id 638B6C4AF1A; Wed, 16 Sep 2026 15:33:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1789572783; bh=qXTRbpJ7ReGwZJ5gYtv8LBnx55PmlIa0iKRgL5OtWxI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=oq092fH/CK6MMaxjIjK+vQOodq3WiApLPtq2lDhU8j95i2VzXt3Aq0+PqB/xBwvNL vZ7mvA/CK8m62cavUZtjfZDfdEMYGFklQ+cvHwUr3GKFqfRUu69Ue8Zue92TeCS+bQ AIeIDg7r5eBxrJBPjF2EwepSkOU0DdkYm+D0p+n5WzuaJ+D36XB+EKHkzLIMcMfjhH RCLmUmcIpFA4K/fr2pjwz6R3QKsZFSXnIM/u1CzxdfCyzGD90AzesKk7sqUX9tyykk Emu+BrWAfZF42ERYPtlyka3UH4XLXsHOyN6cgjAcBsuwxoH5iy00Yy+VDKOrUHuahc 4s+tc794VWwog== 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 50509C982D0; Wed, 16 Sep 2026 15:33:03 +0000 (UTC) From: Jim Cromie via B4 Relay Date: Wed, 16 Sep 2026 09:33:28 -0600 Subject: [PATCH v10 36/38] 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: <20260916-dd-cmap-part2-clean-v10-36-af4cf4767707@gmail.com> References: <20260916-dd-cmap-part2-clean-v10-0-af4cf4767707@gmail.com> In-Reply-To: <20260916-dd-cmap-part2-clean-v10-0-af4cf4767707@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=1789572777; l=2252; i=jim.cromie@gmail.com; s=20260203; h=from:subject:message-id; bh=t4exfKxrgybri5XrCovAfGOptL2KD/oh7WXXahxPsi4=; b=TohONGMwqA/3OVpvRGOo+ardrof1fhxX4yK8PzFM00MjzZwVBwOX7TvDE9VhdXjc8JE8qGeND ekqnZBFXLgFDwK6nIW3FL4norVhX/ECzjj383X44eJGNQdDSAgRZEMe 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 eb28831a6cb2..406b64d67440 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -1183,6 +1183,9 @@ 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; @@ -1198,7 +1201,9 @@ 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; } /* @@ -1211,12 +1216,20 @@ 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) @@ -1268,6 +1281,10 @@ 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