From nobody Mon Feb 9 16:51:53 2026 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 E918F28981C; Wed, 7 May 2025 13:07:02 +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=1746623223; cv=none; b=nNo7+6hgHzjZze+FAEPpfRnuHFqVOQ9RaWcE6fzAcOkAF0zc6BMOq7CIK7h7gADDfd40yKfvTYa9L9SL1SLB5uY/IKjIV8qn7niUgnBKnFu3Ml9jdMmjayDIjNspWyrEC2ZNRbmlzb4DuIzPe59KcXjqVOzdJOqwDoD/Eb2AHP4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746623223; c=relaxed/simple; bh=sWMiF3Jp8psrx0vXllDtK7/+QK0kGDwaFLz+zCQWWb4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Xwx9QYdC+Zkh8CRw25G2iBq4m6B++vOuBedVty0VtDYxw6LTSuKUOohB9ISQQGY0hHw2oSJT97qFtsmp0ocx0LzbiF7Rhw4x+qiPlw1/bhIzgQg7t9RGfah8uYicXw8QCgonHhYMEKL08yZRaFww7BpQNTQR5EjqJFvqc0usaFA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OPWjIqBg; 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="OPWjIqBg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F8A9C4CEE7; Wed, 7 May 2025 13:07:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746623222; bh=sWMiF3Jp8psrx0vXllDtK7/+QK0kGDwaFLz+zCQWWb4=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=OPWjIqBgm18COPGkhkvnoNP5OQEcqxFmHHACaXFLibDTmOQEp7+a9G1roDU2KHJIz UK7EVbtG4J3FURABIQkc+LGJ2cQivI3ZimLvTIfzebXbLhqmm3Z+7T73tBTmHJahM1 rvIztaMyh/+gaTlAaPuwKM8eJee4smFyFCmuas8nupgzscmk8k+cSYxad2Ca90Q6U9 +N4HTgzrF09EQ31r3/+sAhVQ31Fix1c9nJmktU7eyU7OcUrNiPdM+S+KgQ3GPCmL0k A++/LsizCt4Js+hpXqfHkvnXBJjRZkMiEMqJc817m94gvQYv3ZT3k+NELYktq3QWZg F4umwDXeM/wWw== From: Jeff Layton Date: Wed, 07 May 2025 09:06:30 -0400 Subject: [PATCH v8 05/10] ref_tracker: allow pr_ostream() to print directly to a seq_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: quoted-printable Message-Id: <20250507-reftrack-dbgfs-v8-5-607717d3bb98@kernel.org> References: <20250507-reftrack-dbgfs-v8-0-607717d3bb98@kernel.org> In-Reply-To: <20250507-reftrack-dbgfs-v8-0-607717d3bb98@kernel.org> To: Andrew Morton , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin Cc: Kuniyuki Iwashima , Qasim Ijaz , Nathan Chancellor , Andrew Lunn , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, Jeff Layton X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1919; i=jlayton@kernel.org; h=from:subject:message-id; bh=sWMiF3Jp8psrx0vXllDtK7/+QK0kGDwaFLz+zCQWWb4=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBoG1rp5usXP5XgJKw9T/gfib/bf2BnPOewnHgke lh+AS/uB1aJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaBta6QAKCRAADmhBGVaC Fe/DD/49hv4ZtdTkKa+MGD8AR7sJ7Fxu1qo9LkUDBvq3dgnrZxHJSsJkvGim12PnHyDTDHy6qOo PMJtfo+/EWuSLrunWRyAh77cShp6+LMnhCIUhBxk5FbnHQMlJt360cqlVqJtdrjCciW1uLiY9x1 hZvXEf1J3/HC9G3NX6NqitZa6DbDUKn/svEzFe3kTYn7xwquSWMwRMXKiL8kNbHxZp1V6UWU5NP UurWuyhoNX/7mQvL3CQpEKDqdyVkq0/jq3h3WaLdrtBSq91PUloxBEbu36U4pBPibLAjp8DZ3MF v5cRXBEdNXQhO+RPt671I+peCJG5Qv/vQP64+dNkvGSvWAZo4xhH4mvlbxeaquhP5om4Zu7yND8 yr+5YNDgB9G3KI7+gmgXkRZdZJc8movOpx+YDvgUPnZ5HFfn1/UxgN9V1EQgAKGZa/A/EELs3uw UKMpdJTMe9BdErAjheLJtXIX6GBM6ehIYYlUXjzHNb+X46Hg2GGzHTwVhRUpKvFQOr7ltDC3N05 ItJQHy9c4H094ZwYvp7jjXbui4UKhc7yL9TQiG97aMNnX3OwJrqwXV48XRwgMBoULiJgovyIbb6 btjvZ+pfC/dOZo/KakQ3Yaz2hJVmVd6aDhloqJO8b2mjguGAMswfPJyRfRrvU2hIcFVQFJAB26m +AYJTz6OiRKzXrg== X-Developer-Key: i=jlayton@kernel.org; a=openpgp; fpr=4BC0D7B24471B2A184EAF5D3000E684119568215 Allow pr_ostream to also output directly to a seq_file without an intermediate buffer. The first caller of +ref_tracker_dir_seq_print() will come in a later patch, so mark that __maybe_unused for now. That designation will be removed once it is used. Reviewed-by: Andrew Lunn Signed-off-by: Jeff Layton --- lib/ref_tracker.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c index 607718d00ffa74bd6d9abf97e913abcfd56dd1c8..6e85e7eb347d86775ba38a72dad= 7159f9ac41ed9 100644 --- a/lib/ref_tracker.c +++ b/lib/ref_tracker.c @@ -8,6 +8,7 @@ #include #include #include +#include =20 #define REF_TRACKER_STACK_ENTRIES 16 #define STACK_BUF_SIZE 1024 @@ -66,6 +67,7 @@ struct ostream { void __ostream_printf (*func)(struct ostream *stream, char *fmt, ...); char *prefix; char *buf; + struct seq_file *seq; int size, used; }; =20 @@ -300,6 +302,30 @@ EXPORT_SYMBOL_GPL(ref_tracker_free); =20 static struct dentry *ref_tracker_debug_dir =3D (struct dentry *)-ENOENT; =20 +static void __ostream_printf pr_ostream_seq(struct ostream *stream, char *= fmt, ...) +{ + va_list args; + + va_start(args, fmt); + seq_vprintf(stream->seq, fmt, args); + va_end(args); +} + +static __maybe_unused int +ref_tracker_dir_seq_print(struct ref_tracker_dir *dir, struct seq_file *se= q) +{ + struct ostream os =3D { .func =3D pr_ostream_seq, + .prefix =3D "", + .seq =3D seq }; + unsigned long flags; + + spin_lock_irqsave(&dir->lock, flags); + __ref_tracker_dir_pr_ostream(dir, 16, &os); + spin_unlock_irqrestore(&dir->lock, flags); + + return os.used; +} + static int __init ref_tracker_debugfs_init(void) { ref_tracker_debug_dir =3D debugfs_create_dir("ref_tracker", NULL); --=20 2.49.0