From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.web.de (mout.web.de [212.227.17.11]) (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 B7BAD19CD01 for ; Wed, 18 Dec 2024 12:26:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.17.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734524773; cv=none; b=LPys4tZUaxQ63k1Jv1n2BLBIyaS6XAQok522y3aEksqVvKgdy4yXIrnXlJtk2B4H9RIx9Qem/QaGiDAON7c8ekpcaG0Q/LVzDm7/7rxGCeq9MzAj1fYnKAW4x6JF/NDl8eCKeHIBQ3C2vS4L0lpRc6C03EYNr4cDZBBTcyTrs5Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734524773; c=relaxed/simple; bh=ig7AG8T1AnXWDzqJdIAX2iQMlz3n3xBdOkz1wecZSio=; h=Message-ID:Date:MIME-Version:To:Cc:References:Subject:From: In-Reply-To:Content-Type; b=lfo8Wzz6vZ3ibl0u+G1mz4EnMhrpDpH+UofdZYHnkqHQtCeD0ldNcIcs415lPI4wi/eoBE1pfkCbR7kKJwZbzE4q9Vs0YbMShLknOMHSvdfQ43+ypIbF9S9Kstv32q7yIB4Be46PwN+y9utZb/7F312qe8FP+jQ3ykuUe+dBWzY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=web.de; spf=pass smtp.mailfrom=web.de; dkim=pass (2048-bit key) header.d=web.de header.i=markus.elfring@web.de header.b=RyABgzY2; arc=none smtp.client-ip=212.227.17.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=web.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=web.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=web.de header.i=markus.elfring@web.de header.b="RyABgzY2" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=web.de; s=s29768273; t=1734524725; x=1735129525; i=markus.elfring@web.de; bh=rEI9/XBB9+wI1zK7bvLcnE0IuS6BujqC43ua8YifnMM=; h=X-UI-Sender-Class:Message-ID:Date:MIME-Version:To:Cc:References: Subject:From:In-Reply-To:Content-Type:Content-Transfer-Encoding: cc:content-transfer-encoding:content-type:date:from:message-id: mime-version:reply-to:subject:to; b=RyABgzY2NHjvWPrmrM8mGKczH3Ivb3emw1GnXemSYm+jqnNPD4bwcwWnED9BJg4a OBnpAR68Yh9ExCvEbWcl93oGUNPfp9KT9wyU0OIleEQfyhAsz3yT1TwDmMyN3dfay zuzB0oNauuZUuICXx8AczlMGA+5nfpofuJj3ustKv1WkRQeJEIsZ3rLQjASkkIm1M bZOC41S4rPZDr2sFEmWCB3u0YYPnIRESugfdjM1ElNXyxOCH0SPw3eE2Ci/NYdqG0 7U7YTvrSGd9LUdLONnZ5WQUaR/Szx4geByD6AE5wYJhonC2YpB4s1oC5u2y6zBxLS 0DmTt9WijhMHRbyw6A== X-UI-Sender-Class: 814a7b36-bfc1-4dae-8640-3722d8ec6cd6 Received: from [192.168.178.21] ([94.31.70.41]) by smtp.web.de (mrweb105 [213.165.67.124]) with ESMTPSA (Nemesis) id 1MwR4R-1tgmwa2dXx-00ruAz; Wed, 18 Dec 2024 13:25:25 +0100 Message-ID: Date: Wed, 18 Dec 2024 13:25:17 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Jocelyn Falempe , dri-devel@lists.freedesktop.org, Caleb Connolly , Daniel Vetter , David Airlie , "Guilherme G. Piccoli" , Jani Nikula , Javier Martinez Canillas , John Ogness , Maarten Lankhorst , Maxime Ripard , Petr Mladek , Thomas Zimmermann , bluescreen_avenger@verizon.net Cc: LKML , Simona Vetter References: <20241204160014.1171469-3-jfalempe@redhat.com> Subject: Re: [PATCH v9 2/6] drm/log: Introduce a new boot logger to draw the kmsg on the screen Content-Language: en-GB From: Markus Elfring In-Reply-To: <20241204160014.1171469-3-jfalempe@redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:puXIM79LzTyOh/fToopcbY3TNmb4NiVa+nbSGO5VrPYGNEwFsxu ckFdXZBpCPg9QWvd4jqgYbjzBdl2HVSD9bsDlxf3lVHHS/pwddLHT7yOjf+pKXVHF4mlpcz xNxhHK36dpA7Zg2oCDZHSuJu/+hSK82MRhu8HQFiiUMyOGZK+FRcGN+t653qbF3bAyMugF3 ydwZdQyFrYVSFvgEQ21Ww== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:/PpFgzxPh7o=;rawjLivMRgirlrzTE0O6YTKFVOe kIfdD9Q9NY7oOC9l44FWwfXWpEnOdbTUD3ihReOps0lZzMHPYFwc41/HvL1Plt48ax7K2JLSh JxRcNgqPt41YIcJ9hispVEVDkr54/c7GLFgQAgCxUulPXgOUDUJfyiBzzx25t0hqpPeIyRxbC ZHQ+tRLVnSrYaZ7nQjjxzXtFbFpoV5OsgcV7wm6Vft3ol5RqZtZQCYpTW8DYGGBXyVOv2ewAs BXUcrQ1ZsB5nK58rWrcelZJMF/zEKI+NDTtX7PZvEROQda44aENUifADrZ+dROCUBtI+Hv0zc nE2VfiHQ9jyGVYL9WXCDdDEvMrdwG7hWBIOlqZBIQHOIxJrGuey4SWVzZmjLAsONiPZlYa+HE 7Twdl/pMeZqMtAvIO959pTtehKlIS2WLLnf2la5U9zkLewsxeABV9R5YZcL1VbGlmInuDgeXD 4AJipwfcJvR7A8zdwu8SA6bMbyVM6rNv+xLM2Lbi8aFCQJedst+PrVA092CIMmCKbL5np/W5z DP/Au16BrqQ7DpjfehPRcKCqqooNWeAOl1HYGWy4L+PrtivNHQnSr174rV/Vyr64ixl72RKzw Ne+rAAu2uQsCtgBIxDUxKk7kWbtxhfOtwwGTrkw370coSFbUmXgVpa5FV3xlAN74cIlKiioJd XTiBALlKcESmWPDrzV37ah4aKuJ6jFrxBdwJe3hbwfZqdpPm5e/cjPRUw7jklc8FZQErF9Gv7 L7SV+EFXI8WvR/92ayRH14BnYZpENLvc2cKzogl9XQ67/HN64kPtfFHABcKLwWMep2Qtq58kj hR1JEe9hZupERndlWOodARHJxoJTH3phFI7SUZM6IX+oGI9rPMDbX/k5M6/gqUh1UQnpPQ6Zd JV/tssU3yRkfVKkNwp/5KS2mezUX/9wTeQXRKDqVXuRj44ATlBJM1Gh2Vto1IFEoi3b57E1/B 9kfyWADPzAKVFyhdGV/I8K1hJmgmYXZRqZZzybfRQ2qnjzgl6jxMpuIbj0kg9YEJwCBY22S7u /yvawhqX3M1RpxpWVIKpvXQuYS+4g+vqCNyNOlnUDC2OoHLqT41FKzT2dXBViNK888WHX+RAr 391Vb3l7s= =E2=80=A6 > +++ b/drivers/gpu/drm/clients/drm_log.c > @@ -0,0 +1,370 @@ =E2=80=A6 > +static int drm_log_count_modeset(struct drm_client_dev *client) > +{ > + struct drm_mode_set *mode_set; > + int count =3D 0; > + > + mutex_lock(&client->modeset_mutex); > + drm_client_for_each_modeset(mode_set, client) > + count++; > + mutex_unlock(&client->modeset_mutex); > + return count; > +} =E2=80=A6 Under which circumstances would you become interested to apply a statement like =E2=80=9Cguard(mutex)(&client->modeset_mutex);=E2=80=9D? https://elixir.bootlin.com/linux/v6.13-rc3/source/include/linux/mutex.h#L2= 01 Regards, Markus