From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=198.175.65.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792940662; b=3zyd4qPsd1HzdQjNsqoejKEmrWhO+uCDLeL4Tez9I1gx9I1fjJmCjK1cU6vVKDow+OgM FPUQasGT0Ib6MerzmNcquxGt88wqvpB0DX/reSkb1Zw+IBGc/PJN2E1QYi0C7YNtpin1I kkRAZlKW7wVO4TKE5/lEnuwEPUrNDFhRxx4XEDSnSQ8RuJQrMpmKrEJb4pysiX3QXrC1T 1cNub6dyzh210S+dS46w8YdlRUq3kCq/pK49zup+xKnn9W7KRGwvkpPnYzjU8hecyPoE2 N4lP3N7MVzYQWvLX7bbLzHiKizm9NIHndILDJdeprnMo+WYykgHcEy7/AAQSmS40wyw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792940662; h=DMARC-Filter:DKIM-Signature:X-CSE-ConnectionGUID:X-CSE-MsgGUID: X-IronPort-AV:X-IronPort-AV:Received:X-CSE-ConnectionGUID: X-CSE-MsgGUID:X-ExtLoop1:X-IronPort-AV:Received:Date:From:To:Cc: Subject:Message-ID:References:MIME-Version:Content-Type: Content-Disposition:In-Reply-To:Organization; bh=rS3/wqoyUiFC/nwlEVyVdFa4VAmvnpE3Qb2WkVE+lSE=; b=344R/nswe8DinE1bbZJaxP1J8e7r6Vrmw8slnnkRRCGxUh2fHb79UXKHPp/R54HZbEh3 lWwattlyPLwqeHZ+ThO2A2AAP8E+O4nst2flpNOs7ITblyocbvJS/eGOi6zWAayPG460+ 83BBCyvVQBBYewgUaSkfstkyTlj0tHpTjus0lxC6ZhuOFt546BiVv22UosUY5fhBrTlig ExVIKpEK+3B3v97fvOsx0mhmZDOzqpNQ0QfdW0D3OwI1pkmw5PSIu5O3XlYReY3mQmwiS 9ag777omlqL/7wRTRONBGrT+UZXOlzd3QIIobtcOqhyOLUNbFPN/HIioFKI81MCvP6A== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=NT8kzVzT; arc=none smtp.remote-ip=198.175.65.18 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.18]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 63B98606A31B; Sun, 25 Oct 2026 15:04:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 63B98606A31B Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=NT8kzVzT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1792940661; x=1824476661; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=mbitdxTff249OBDqO5321R0i6ugZINRmq8qsd0e14/U=; b=NT8kzVzTDbOLMSXUsBaCvB7A4KRSJGK2b+C4a4c+yZpz0qpdpUozKdWa ML2W/d4UK9xQKJZe7baMbDdIpXEDLpIW8PZzWvWPM30QlhmkhoD3P5Ia1 vSGXgLg/TY7tr5zEorNxfA86Bkyqr+79NPkbXa3o0o3mO9n11Ya/3GuJ7 wxaRwu4TGXKrg+gXZ7Rc4VpFu3UnA57w4u9Eg2Y6PW0DwxlGK4V85pfY6 2vQzhJQ1kxGo7EHrcwA0ToCXJ13fLQwQOmS+heVfceuRp0CohQiS1Lfus 97Dq3rxGzemlHj/v7sgvoxgYyjbnoeYzp7IJ2oTzgpCn+LIaR8Rj14eBX g==; X-CSE-ConnectionGUID: e6424VpLTsa44yc9Fd4Mnw== X-CSE-MsgGUID: swPqWkwWSaGqb7qNh9blIg== X-IronPort-AV: E=McAfee;i="6800,10657,11946"; a="1623171" X-IronPort-AV: E=Sophos;i="6.27,178,1787036400"; d="scan'208";a="1623171" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by orvoesa110.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Oct 2026 08:04:21 -0700 X-CSE-ConnectionGUID: pobX85RvRdSp/PhX9BTmGw== X-CSE-MsgGUID: g5SvmkfrRiurS7nX9CyIDg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,178,1787036400"; d="scan'208";a="4404121" Received: from hrotuna-mobl2.ger.corp.intel.com (HELO localhost) ([10.245.245.10]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Oct 2026 08:04:18 -0700 Date: Sun, 25 Oct 2026 17:04:16 +0200 From: Andy Shevchenko To: Abubakar Musa Samaila Cc: julia.lawall@inria.fr, gregkh@linuxfoundation.org, andy@kernel.org, outreachy@lists.linux.dev, linux-staging@lists.linux.dev, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3] staging: fbtft: fb_upd161704: Replace udelay() with usleep_range() Message-ID: References: X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo On Sun, Oct 25, 2026 at 03:22:30PM +0100, Abubakar Musa Samaila wrote: > Replace udelay() calls inside the init_display() initialization > sequence with usleep_range() to avoid CPU busy-waiting. Since > init_display() runs in a non-atomic context, sleeping allows the CPU > to yield, improving power efficiency and system responsiveness. Please, slow down. I have already answered on very beginning version. Don't waste time on this. -- With Best Regards, Andy Shevchenko