From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 A43D2279329 for ; Fri, 23 Jan 2026 15:52:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769183547; cv=none; b=VZHNab7kHbUyiBYYq5vAMYkAQLBVxPWy+9WvPzb3LgN5I0Q8bRISgT4Zxctw/q3QfS/UT+xdqiW2ONdy0dhEAGrLlcHbpr+/qSo0K2jEbI4aL7cmYD1ZTqW4uOVfafcguWvmjWkaxN0wqblR7ebgX7rkQzvVqWv7qwHQIxvEcqE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769183547; c=relaxed/simple; bh=2Zo4HgsrmwWu+dQR2vyKALKiBwxO2WNfinCBcwJ87hg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=CuKv3hEBQ+cREYLCvSeEwj92fv+zDjEen+deThSJ0RIsZL0Z1zuNQbfgH9EiyTkYeGVcYP6xxloMBTQi4hD+Ed4cWGjv4wPvAx7Uf1upCGFe20eHpzB0cHbDF5szPPzczULABVLjuQ/vzPmM45GSWJWBmK98JhIu5tp90ijubg8= ARC-Authentication-Results:i=1; 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b=HKm+AMP9vphBJrO/C1sAFquKTKRImtjhsGfOhb+eqb9m8/11fTWZPWK62nZ/3Ns2y BOcHi+MqOiUyL7x+HDLjsG9bTRA/vR+7QXS/I0zUjBzJvy3h6lC3NZNbmMRJ831fNM QbZvBJu9Eh3tiTQQhvsTdOY7COA2R+tz5ZW7oJ4E= Date: Fri, 23 Jan 2026 17:52:23 +0200 From: Laurent Pinchart To: Marek Vasut Cc: kernel test robot , Tomi Valkeinen , oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Tomi Valkeinen Subject: Re: include/linux/compiler_types.h:597:38: error: call to '__compiletime_assert_495' declared with attribute error: FIELD_PREP: value too large for the field Message-ID: <20260123155223.GC415966@killaraus> References: <202601230809.FBjF6OrH-lkp@intel.com> 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-Disposition: inline In-Reply-To: On Fri, Jan 23, 2026 at 11:15:35AM +0100, Marek Vasut wrote: > On 1/23/26 1:58 AM, kernel test robot wrote: > > Hi Marek, > > > > FYI, the error/warning still remains. > > > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > > head: a66191c590b3b58eaff05d2277971f854772bd5b > > commit: 4f716a1db661cfb31502a0a6d7e62c06daf2e603 drm/rcar-du: dsi: Convert register bitfields to GENMASK() macro > > date: 3 months ago > > config: arc-randconfig-r053-20260123 (https://download.01.org/0day-ci/archive/20260123/202601230809.FBjF6OrH-lkp@intel.com/config) > > compiler: arc-linux-gcc (GCC) 8.5.0 > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260123/202601230809.FBjF6OrH-lkp@intel.com/reproduce) > > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > > the same patch/commit), kindly add following tags > > | Reported-by: kernel test robot > > | Closes: https://lore.kernel.org/oe-kbuild-all/202601230809.FBjF6OrH-lkp@intel.com/ > > > > All errors (new ones prefixed by >>): > > > > In file included from : > > drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c: In function 'rcar_mipi_dsi_startup.isra.6': > >>> include/linux/compiler_types.h:597:38: error: call to '__compiletime_assert_495' declared with attribute error: FIELD_PREP: value too large for the field > > _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) > > ^ > > include/linux/compiler_types.h:578:4: note: in definition of macro '__compiletime_assert' > > prefix ## suffix(); \ > > ^~~~~~ > > include/linux/compiler_types.h:597:2: note: in expansion of macro '_compiletime_assert' > > _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) > > ^~~~~~~~~~~~~~~~~~~ > > include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' > > #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) > > ^~~~~~~~~~~~~~~~~~ > > include/linux/bitfield.h:68:3: note: in expansion of macro 'BUILD_BUG_ON_MSG' > > BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \ > > ^~~~~~~~~~~~~~~~ > > include/linux/bitfield.h:115:3: note: in expansion of macro '__BF_FIELD_CHECK' > > __BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \ > > ^~~~~~~~~~~~~~~~ > > drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi_regs.h:259:29: note: in expansion of macro 'FIELD_PREP' > > #define VCLKSET_DIV_V4H(n) FIELD_PREP(VCLKSET_DIV_V4H_MASK, (n)) > > ^~~~~~~~~~ > > drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c:660:14: note: in expansion of macro 'VCLKSET_DIV_V4H' > > vclkset |= VCLKSET_DIV_V4H(__ffs(setup_info.vclk_divider) - 1); > > ^~~~~~~~~~~~~~~ > > Hello Tomi, Laurent, > > maybe it would be good to pick: > > drm/rcar-du: dsi: Clean up VCLK divider calculation > > that was posted about a month ago and fixes this exact warning ? About half a month actually. I've reviewed the patch (thanks for the ping) and asked Tomi to push it. -- Regards, Laurent Pinchart