From patchwork Thu Feb 20 21:02:57 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Bolle X-Patchwork-Id: 3689931 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 850F8BF13A for ; Thu, 20 Feb 2014 21:03:13 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9B53720179 for ; Thu, 20 Feb 2014 21:03:12 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 9EFB920145 for ; Thu, 20 Feb 2014 21:03:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A9D53FA64C; Thu, 20 Feb 2014 13:03:03 -0800 (PST) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from cpsmtpb-ews07.kpnxchange.com (cpsmtpb-ews07.kpnxchange.com [213.75.39.10]) by gabe.freedesktop.org (Postfix) with ESMTP id 78243FA64C for ; Thu, 20 Feb 2014 13:02:59 -0800 (PST) Received: from cpsps-ews03.kpnxchange.com ([10.94.84.170]) by cpsmtpb-ews07.kpnxchange.com with Microsoft SMTPSVC(7.5.7601.17514); Thu, 20 Feb 2014 22:02:58 +0100 Received: from CPSMTPM-TLF104.kpnxchange.com ([195.121.3.7]) by cpsps-ews03.kpnxchange.com with Microsoft SMTPSVC(7.5.7601.17514); Thu, 20 Feb 2014 22:02:58 +0100 Received: from [192.168.1.104] ([82.169.24.127]) by CPSMTPM-TLF104.kpnxchange.com with Microsoft SMTPSVC(7.5.7601.17514); Thu, 20 Feb 2014 22:02:58 +0100 Message-ID: <1392930177.15264.5.camel@x220> Subject: [PATCH] drm/radeon: silence GCC warning on 32 bit From: Paul Bolle To: Dave Airlie Date: Thu, 20 Feb 2014 22:02:57 +0100 In-Reply-To: <1391085212.5170.9.camel@x41> References: <1391085212.5170.9.camel@x41> X-Mailer: Evolution 3.10.4 (3.10.4-1.fc20) Mime-Version: 1.0 X-OriginalArrivalTime: 20 Feb 2014 21:02:58.0189 (UTC) FILETIME=[21EC43D0:01CF2E7F] X-RcptDomain: lists.freedesktop.org Cc: Alex Deucher , Christian =?ISO-8859-1?Q?K=F6nig?= , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00,FREEMAIL_FROM, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Building radeon_ttm.o on 32 bit x86 triggers a warning: In file included from include/asm-generic/bug.h:13:0, from [...]/arch/x86/include/asm/bug.h:38, from include/linux/bug.h:4, from include/drm/drm_mm.h:39, from include/drm/drm_vma_manager.h:26, from include/drm/ttm/ttm_bo_api.h:35, from drivers/gpu/drm/radeon/radeon_ttm.c:32: drivers/gpu/drm/radeon/radeon_ttm.c: In function 'radeon_ttm_gtt_read': include/linux/kernel.h:712:17: warning: comparison of distinct pointer types lacks a cast [enabled by default] (void) (&_min1 == &_min2); \ ^ drivers/gpu/drm/radeon/radeon_ttm.c:938:22: note: in expansion of macro 'min' ssize_t cur_size = min(size, PAGE_SIZE - off); ^ Silence this warning by casting "PAGE_SIZE - off" to size_t. Since "PAGE_SIZE - off" is between 0 and PAGE_SIZE, and PAGE_SIZE is at most 21 bits wide while size_t is at least 32 bits wide, this should be safe. Signed-off-by: Paul Bolle --- Compile tested only (on 32 and 64 bit x86). drivers/gpu/drm/radeon/radeon_ttm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index 77f5b0c..5c87979 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -935,7 +935,7 @@ static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf, while (size) { loff_t p = *pos / PAGE_SIZE; unsigned off = *pos & ~PAGE_MASK; - ssize_t cur_size = min(size, PAGE_SIZE - off); + ssize_t cur_size = min(size, (size_t)(PAGE_SIZE - off)); struct page *page; void *ptr;