Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751632AbaLOLR3 (ORCPT ); Mon, 15 Dec 2014 06:17:29 -0500 Received: from foss-mx-na.foss.arm.com ([217.140.108.86]:49683 "EHLO foss-mx-na.foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750983AbaLOLRX (ORCPT ); Mon, 15 Dec 2014 06:17:23 -0500 Date: Mon, 15 Dec 2014 11:17:16 +0000 From: Will Deacon To: "Michael S. Tsirkin" Cc: "linux-kernel@vger.kernel.org" , Arnd Bergmann , "linux-arch@vger.kernel.org" , Catalin Marinas , Christopher Covington , "linux-arm-kernel@lists.infradead.org" Subject: Re: [PATCH 03/18] arm64/uaccess: fix sparse errors Message-ID: <20141215111716.GG20738@arm.com> References: <1418575877-21488-1-git-send-email-mst@redhat.com> <1418575877-21488-4-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1418575877-21488-4-git-send-email-mst@redhat.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Dec 14, 2014 at 04:52:09PM +0000, Michael S. Tsirkin wrote: > virtio wants to read bitwise types from userspace using get_user. At the > moment this triggers sparse errors, since the value is passed through an > integer. > > Fix that up using __force. > > Signed-off-by: Michael S. Tsirkin > --- > arch/arm64/include/asm/uaccess.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h > index 3bf8f4e..8d66bcf 100644 > --- a/arch/arm64/include/asm/uaccess.h > +++ b/arch/arm64/include/asm/uaccess.h > @@ -147,7 +147,7 @@ do { \ > default: \ > BUILD_BUG(); \ > } \ > - (x) = (__typeof__(*(ptr)))__gu_val; \ > + (x) = (__force __typeof__(*(ptr)))__gu_val; \ > } while (0) > > #define __get_user(x, ptr) \ Acked-by: Will Deacon Will -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/