From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Subject: Re: [PATCH 1/1] drivers/staging/pi433: New driver Date: Thu, 20 Jul 2017 14:37:05 +0300 Message-ID: <20170720113705.d65hxm3jbki2ynqd@mwanda> References: <39f4e59cae6d241235f8f2cc6eebb33c-EhVcX1pHQwdXWkQFBhENSgEKLlwACzJXX19HAVhEWENbS1kLMF52CEtUX1pBSEwcXlJRL1lQWAheVn4GUFc=-webmailer1@server05.webmailer.hosteurope.de> <201707172156.DCyTyWc2%fengguang.wu@intel.com> <652336354.3806.1500549785404@ox.hosteurope.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <652336354.3806.1500549785404@ox.hosteurope.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" To: Marcus Wolf Cc: devel@driverdev.osuosl.org, devicetree@vger.kernel.org, Greg KH , linux-kernel@vger.kernel.org, robh+dt@kernel.org, kbuild-all@01.org, grant.likely@linaro.org List-Id: devicetree@vger.kernel.org On Thu, Jul 20, 2017 at 01:23:05PM +0200, Marcus Wolf wrote: > Hi Greg, > > below you can see the report with the error on m68k. It was sent to me from a > test robot of intel. > > According to my research, this problem occured, because there is no hardware > support for floating point on the m68k (or it was configured not to use it). > Therefore gcc uses an internal function, provided by libgcc. Obviously libgcc > wasn't linked... > > I don't know how to come arround this problem by modifying my code (except > reducing the accuracy of the calculation by not using floating point). I don't see any floating point? You're not allowed to use floating point in the kernel. > > Can we ignore the error or can I do something else? > Maybe a special include just in case of m68k can help??!? > I don't have an environment for building m68k. > I think the answer is to use div_u64() and div64_u64 instead of do_div()? Or you could just add a depend in the Kconfig. regards, dan carpenter