From nobody Mon Feb 9 08:12:52 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 0A5C626A09A; Tue, 27 May 2025 11:33:55 +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=1748345636; cv=none; b=gCJims7uF92mq5HSRJno0Vd/WnFRzHl/QoVW7PjW+RwQoxAtoE80mmAUgSp3XS/1jbVDwkYJ3kOt3I/YkPSdq7m+FdfFHbXFSvnWBrpZ6nMxBk0EAy2z19LJMLWGWfCtkzvBJ9Y7K4GZSSmwnDa4AbYmDMO0PD95h28ASwCtVTo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748345636; c=relaxed/simple; bh=sWMiF3Jp8psrx0vXllDtK7/+QK0kGDwaFLz+zCQWWb4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=P+XUjcmFE2SlsyexxkrVz7VcxhV1UoA/yV0kssyZ4BU46mhDgCVMreZ7KQB+qJOBzsLephSUJ6b1cUWYp/qpHSYR1K7wL+aSRWtnm8sn09T6whTnNI/Ivo/qtq8eU+lwD5p8Q/21eXCPI1LKh8zccjSXJCSNhwoTzaltkgwJhxA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BDIYW+fw; 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="BDIYW+fw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B9EEDC4CEE9; Tue, 27 May 2025 11:33:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748345635; bh=sWMiF3Jp8psrx0vXllDtK7/+QK0kGDwaFLz+zCQWWb4=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=BDIYW+fwqMI09RZYAciuHlIbBjnGW9chKRJIXyJ+JL5+YeWSu83O2JWwx7h2Bn3tG MIVhCIiFJI6aUIFYShuQbqTHqW1fkefm2y7ULlDcdsyrTX0y762VQqJ5MHudUAaAf7 3isfJvgj0+MFTq9c5MLIR7BR/MGDMoS8xyEcHpFhlJMOrwSgw+S0F+AWoGGRbcfUpW 0RVSXf13LU7h9r1eyptqijHfdpEVQspG1PGBOvBv1Barfgsg2YLhls2VCj8KlKe044 tSBqWFiZ9Ym43+pbLHlx0RyEhBMMiRWSXSkC5uwhz76fEZHJHc10+hwKnuEyfKev1W CVNkb6+8ge1Nw== From: Jeff Layton Date: Tue, 27 May 2025 07:33:36 -0400 Subject: [PATCH v10 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: <20250527-reftrack-dbgfs-v10-5-dc55f7705691@kernel.org> References: <20250527-reftrack-dbgfs-v10-0-dc55f7705691@kernel.org> In-Reply-To: <20250527-reftrack-dbgfs-v10-0-dc55f7705691@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/ZANAwAKAQAOaEEZVoIVAcsmYgBoNaMWF/87pk7ph2I1igNw6LWz3m9XwND5YyFpF EGY0dEcpkKJAjMEAAEKAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaDWjFgAKCRAADmhBGVaC FbrOEADTxFmBBAPCa8mCL+K+h5Tw44w48pwSG7qK06+nCX6ur7yrdfsYSzhaLQCl43wJmDh9HSC Asnf0wG+MEtPsrEWgW21rMHnMpXAFMw/FdaDs6eKYtd0nX2aP1GzKwNqXTvwTVMI4xIQRPh+XUv j3yOeqNFRPwVrJnHwnIDBkHRoY2PKtqJUnC9kdGl9wSCXlflVF1GQmCn4NNiZgWdR5uijz7+1M+ RENwIZrlWPtNK0geqixyhMucaLc4ZsPMsWSwBOPSRPUOtrsqMS9mC2Hg1csMiKJXU5ZV44copG1 XyhwfnkGWNF41vK+2piuYGdpIglp8cT5s/QlKFvFjllJtdfv/iv5CgRzinP6vglJnhBj9h/FlzM C7hygnr31iY1uT5TDSjBBHFb197UU9lijmAt20rqgFqiQ8RjmGsbL/VtdGA4aIV4GzY/e+0NOa0 X8CQuLtD5h23YSZWAkdgm15DuJ7Ql13ELIDYoT6kg8u/ycQXb7uscSuNFQoFwDbvnLKEx2BN0md jBLoYa8INmRHFrDGDGfIabGPYxcauchE5SLlNXrWt5ReDALNW1/WB2uknh2mjBbJC1STqVGaWON Jr1mJJbqbECghXmff91VNiel/jQdoHOPpv73RZs/lamsm0vUQo0GwfyeL0HlwyW6XFHX+xm9rPG AS3QH+Sd+fUTvvQ== 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