From nobody Tue Oct 7 21:48:15 2025 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 BF6F923315E; Tue, 3 Jun 2025 11:27:36 +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=1748950056; cv=none; b=bHURoyf1Z/hr8/+xQl6hL34gItLgFngTxfn4oixJWm+iwV7lf5ERghA8sJdBc3ni14HpvbbtGgSNaXSy++HQUEpebd0UNm76xi7iQzs0pMZBctox0ruT1lhUpXdA89k1h/O5sNXakxhjDXkgDOWd33/JGePOZcXyt64KPCq0wQk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748950056; c=relaxed/simple; bh=fIUtfKsTxdswV0+z7NV6Nx2ljCgH4pcViNimfWT3u1o=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=QIgg/2j4TbQoJVzBa09OXwlr8LmrZAqbnX6B2djBFJHKUblsvYd8dXiK9KgIZJhJb2RS+JV0fgqBz5/e3wMXtmeqFkYFjVnLb8wNC4rrHXDfe5OWTgAKFh9rkS+EMs1SIRrcFgEykXaCLm75BijEIdr6DSDeaHxRetk4KJWE4Lw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hZ67idAk; 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="hZ67idAk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 315F9C4CEF2; Tue, 3 Jun 2025 11:27:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748950056; bh=fIUtfKsTxdswV0+z7NV6Nx2ljCgH4pcViNimfWT3u1o=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=hZ67idAkz1Q6WEjCvJXL8tiUJJl7YaEYyEbBZuiihtliUd1F0zKdiG3j7C+knHL6T MGcArYUs+QlL/jtLXLwmL7/SD9AV4YVT5uuWSJftlZoJ8hxJw/SNFfQJDc8GOc8Qs7 cL8kTXvoo6PTkj8gMVJsl+WvFDLcD6JT/72BMaZIVcICtZPSuRBm0TG+vtHCVIfdE3 vTAe7l2schRgJHCJoBmXCpbNtjgifEvPjyvPApxH47a5AIToOEMeNlguciFYHbm/y1 8B2tC09pehQOZK+N7NyDdF51sjQlA4lxNvDFT1IEVyAz/RJ4FSs+rHwXnHUVsQqjxM EFdxNleToic8A== From: Jeff Layton Date: Tue, 03 Jun 2025 07:27:16 -0400 Subject: [PATCH v13 5/9] 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: <20250603-reftrack-dbgfs-v13-5-7b2a425019d8@kernel.org> References: <20250603-reftrack-dbgfs-v13-0-7b2a425019d8@kernel.org> In-Reply-To: <20250603-reftrack-dbgfs-v13-0-7b2a425019d8@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: Krzysztof Karas , 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=fIUtfKsTxdswV0+z7NV6Nx2ljCgH4pcViNimfWT3u1o=; b=owEBbQKS/ZANAwAKAQAOaEEZVoIVAcsmYgBoPtwa9bpttiNqpcPN4Dy+8lJv4cCAkk+aG9TvK wIKUa64/syJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaD7cGgAKCRAADmhBGVaC FcSOD/0XA5UcipIKa/Kur3XJr6W8uSqfyPG2GmcQickNUCE8HdODpm1TkAUo47yCmvNl5qZqln9 i2It8fvz1p5bOCyJZrbnNksGeXCCYdhc+tl19o+l1un2lTYDblk6KTo4XzyPGy9LSKsiTVJSU/c bHiDY3ilrllcFseuJ1N6INjf7aS++IR01NAzzIaRDv+E658gSc3ZSEjfOvdSulSSZuNRQE1PHpx TchJMTUtuRzR4qqu9VC9nZX06GaTAe8mlpai27RYDH/OdkBb/dYFAC1eFK68C0df6Bi2Qsf9pSk tCL8PBQeD6mlz9T5s41VPKG2fQuOMlm8MjAT4Jp3FfoGTTxkrC3uF4bNV+bg3EYONQD7rJeSSLG Ng5NlhwhiQRYE30KNBzfaLcheaRbEA5ckNinxtPWj3M9RT9l3GxXJDOskm3yUd9+jRsJ3AMkjq+ r+mGkPpVm/MiGhqMt4eDi2XIbfMzsCCQ+6OcqwEp89Cv7/wp822ZwxbmCOUrSBTTOB+HPHMOv1D +DOLOBylfFEiG2tUIpwl1eM4r6gZ1n2/gOqZKUQJG221UvfVrJqdSmc678XONHhwy5uJ+LQb5gr ex3YfG/Nsxksm8CiNsMlx4md9Wf0ktlCptT541Ex4XRk5vsK4S9IPaph1yOyPqy22OASEMWdkly btSTkodR2Q7Xptw== 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 42872f406b2a91b5bc611405cae7ce883fd8ed22..73b606570cce9e551d13e65365a= 87dc4ce748b13 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 @@ -301,6 +303,30 @@ 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