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 7B3322638A3; Wed, 30 Apr 2025 15:07:08 +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=1746025628; cv=none; b=TcHpf+ZiR3BBqA0DcYw6UbMaHWr/tQ5SOdJvwFp0lvPCymlD0ssJOqpMQWkRp27FbRFUiMStaVpR4NM/NY95UP8fGv+KYCMGLnGHv4wWnV+BTvQMhJko5VKZTtgT4Xh0iKk05d3ffcp0g6sbxZuClfa7FWO7PkUrB7L9wG2emE8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746025628; c=relaxed/simple; bh=jnlBKJie8sIeQlm8A0Xfcctk6HgKFM10uOFIjHSJE7k=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=lADb9QDPxM4XSGpOfGORGOIqskqsm0/Li4H5CRJOcaaqj9dE9wzk7gomspSxEA6PqHkb+diO32VuYAXKuJWwEeZADNm9wh/HUq1SjCxJGJFIerezZJOHBEasvF99zDMJMSGKAf6nsxGMVC6HvSEao4TDsUDEnasYjPdOviG6B34= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MSXuD2PK; 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="MSXuD2PK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F2A14C4CEE7; Wed, 30 Apr 2025 15:07:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746025627; bh=jnlBKJie8sIeQlm8A0Xfcctk6HgKFM10uOFIjHSJE7k=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=MSXuD2PK8yuzpEK1lxSomb/zNOg+RoGHyaCk5buzelFPYi+s7O4VQpBwhs26AiWvL zZ4Kj0nyCrU1saexccZ2x7WcEXDxq49VSTRvpXM4Y3bbqqlP9sfM9MQvykx8YFhUwr 5s6ABRkGNY920tAtLnmQkaMd/eh34LaEpp1tADm3DGGbDaXQW1Fyvy6HqWEnmlx12g +1BucqMX0ofN+UMYWVZK5A336Mu5bh03vJjvrCabIgYak2/3/cGlj7YLAVMX5heLN0 fMNeOLG5dCNvfoaKUCtI2K2h2RFqU0wgncDJL3XQf2iLzhrOo2xyGDqPoQSGz6PiWk HEoTtAR3hwbzg== From: Jeff Layton Date: Wed, 30 Apr 2025 08:06:51 -0700 Subject: [PATCH v6 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: 7bit Message-Id: <20250430-reftrack-dbgfs-v6-5-867c29aff03a@kernel.org> References: <20250430-reftrack-dbgfs-v6-0-867c29aff03a@kernel.org> In-Reply-To: <20250430-reftrack-dbgfs-v6-0-867c29aff03a@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=2126; i=jlayton@kernel.org; h=from:subject:message-id; bh=jnlBKJie8sIeQlm8A0Xfcctk6HgKFM10uOFIjHSJE7k=; b=owEBbQKS/ZANAwAIAQAOaEEZVoIVAcsmYgBoEjyTBd35szOPXiAQJ1K7Sn3JUye1X+axt1Ajw UWlj/3vSbWJAjMEAAEIAB0WIQRLwNeyRHGyoYTq9dMADmhBGVaCFQUCaBI8kwAKCRAADmhBGVaC FZZQEACmu7RHfJdVK64+DbZKtpY1CZTAhoZHbZOAUJk6IWqIOhP7Z8aDxpS0Y43mF6hV7x2HDEO SwgoCYM11votmxNyAoOgIV1Bykm/Rs6++nx92eZM3tfAzJZdLP1goUkJh7pTsT6ysg2+ovhhNQV T1zEexyCBJmTO4BQXiRC+CIxzeR5obO1weF277irEJXyfBFbqdJHOY36LrLOclWxYXv4llhuZkm OkS8V50W+9EUS4SHYr5vxeyXsswDHA28jpmZ4cH2dntxZZKG6pH8n1/R9srcSCSU8rlqD5dfa6p phtt9EHEuasBDVqkUCr2W+CK1POwV8TfHT5ZSjRPfdLhhwBnOcFwvjHN5Vv+j0p8VzKYhmhgHgk TIbGcOE1/bLiclmCNzyskvOwdnxS1eVqyYb6fQ6NmfZFomyHaKfV16fX0sEmYhFmUiHmTUZMrpD PM8TIrQ0oym7N23fpU9fuIs/l7urTLdVwzzhCLUfzkQG2eTlVfZgiJh9Y+f8NDE8msgDcBnaGhp N2+RtscjB0JNWCYB9BtOrF9IeCQeMQx/fFtnhOJu0JQPBsv1bx1st/tfTlixW4ge/MV/nfonC7v MXgw4fbNEMjdZkbswE3qgNa2W4FJsImW1SGYLoUp1G/bNsElihR1RfBzr35WSWxRUm6pgodW+BP K2p0vXa1ek+bkcw== 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 b6e0a87dd75eddef4d504419c0cf398ea65c19d8..b69c11e83c18c19aaa2dc23f802291d4a7e82a66 100644 --- a/lib/ref_tracker.c +++ b/lib/ref_tracker.c @@ -8,6 +8,7 @@ #include #include #include +#include #define REF_TRACKER_STACK_ENTRIES 16 #define STACK_BUF_SIZE 1024 @@ -70,6 +71,7 @@ struct ostream { void __ostream_printf (*func)(struct ostream *stream, char *fmt, ...); char *prefix; char *buf; + struct seq_file *seq; int size, used; }; @@ -93,6 +95,15 @@ static void __ostream_printf pr_ostream_buf(struct ostream *stream, char *fmt, . stream->used += min(ret, len); } +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); +} + #define pr_ostream(stream, fmt, args...) \ ({ \ struct ostream *_s = (stream); \ @@ -302,6 +313,21 @@ EXPORT_SYMBOL_GPL(ref_tracker_free); #ifdef CONFIG_DEBUG_FS #include +static __maybe_unused int +ref_tracker_dir_seq_print(struct ref_tracker_dir *dir, struct seq_file *seq) +{ + struct ostream os = { .func = pr_ostream_seq, + .prefix = "", + .seq = 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 = debugfs_create_dir("ref_tracker", NULL); -- 2.49.0