From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paulo Zanoni <paulo.r.zanoni@intel.com>
Subject: Re: [PATCH] drm/i915/dp: fix shifting by a negative number of bits
Date: Wed, 12 Sep 2018 15:02:30 -0700
Message-ID: <1536789750.2958.17.camel@intel.com>
References: <20180912143153.GA27564@embeddedor.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <dri-devel-bounces@lists.freedesktop.org>
In-Reply-To: <20180912143153.GA27564@embeddedor.com>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>, Jani Nikula <jani.nikula@linux.intel.com>, Joonas Lahtinen <joonas.lahtinen@linux.intel.com>, David Airlie <airlied@linux.ie>
Cc: intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, "Vivi, Rodrigo" <rodrigo.vivi@intel.com>
List-Id: dri-devel@lists.freedesktop.org
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