From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fengguang Wu Subject: Re: [wireless-next:master 70/102] drivers/net/wireless/b43/phy_ht.c:338:35: sparse: cast truncates bits from constant value (ffff3fff becomes 3fff) Date: Tue, 16 Sep 2014 10:17:18 +0800 Message-ID: <20140916021718.GB16455@localhost> References: <541742fe.FxHiltLcSOUDGDDj%fengguang.wu@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mga02.intel.com ([134.134.136.20]:52252 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752791AbaIPCRW (ORCPT ); Mon, 15 Sep 2014 22:17:22 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-sparse-owner@vger.kernel.org List-Id: linux-sparse@vger.kernel.org To: =?utf-8?B?UmFmYcWCIE1pxYJlY2tp?= Cc: "John W. Linville" , kbuild-all@01.org, Christopher Li , Linux-Sparse I could disable this warning in my reports, but CC sparse authors first to check if there are more elegant solutions. On Mon, Sep 15, 2014 at 11:16:09PM +0200, Rafa=C5=82 Mi=C5=82ecki wrote= : > On 15 September 2014 21:50, kbuild test robot wrote: > > tree: git://git.kernel.org/pub/scm/linux/kernel/git/linville/wire= less-next.git master > > head: 1030f9fe65602465a89beaa05c3343cf9fd68a88 > > commit: 1f21de53ac8651b1a3e79576f1adf00aabecd052 [70/102] b43: HT-P= HY: Implement band switching > > reproduce: > > # apt-get install sparse > > git checkout 1f21de53ac8651b1a3e79576f1adf00aabecd052 > > make ARCH=3Dx86_64 allmodconfig > > make C=3D1 CF=3D-D__CHECK_ENDIAN__ > > > > > > sparse warnings: (new ones prefixed by >>) > > > >>> drivers/net/wireless/b43/phy_ht.c:338:35: sparse: cast truncates = bits from constant value (ffff3fff becomes 3fff) > > > > vim +338 drivers/net/wireless/b43/phy_ht.c >=20 > I already got the same sparse warning twice (for different parts of c= ode): >=20 > Message-ID: <53b5ab1e.Y9bKd3t4DteE6Pzc%fengguang.wu@intel.com> > [wireless-next:master 163/164] > drivers/net/wireless/b43/phy_n.c:5671:55: sparse: cast truncates bits > from constant value (ffff7fff becomes 7fff) >=20 > Message-ID: <53c97150.9C2t3ebOTkndUZD5%fengguang.wu@intel.com> > [wireless-next:master 70/75] drivers/net/wireless/b43/phy_n.c:6077:35= : > sparse: cast truncates bits from constant value (ffff3fff becomes > 3fff) >=20 > In both of them I pointed that this is an expected behavior. No other > solution was proposed. >=20 > Can this test be fixed or disabled? -- To unsubscribe from this list: send the line "unsubscribe linux-sparse"= in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html