From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:37378 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753877AbeBWSfl (ORCPT ); Fri, 23 Feb 2018 13:35:41 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Arnd Bergmann , "David S. Miller" Subject: [PATCH 4.4 064/193] vmxnet3: prevent building with 64K pages Date: Fri, 23 Feb 2018 19:24:57 +0100 Message-Id: <20180223170335.983494978@linuxfoundation.org> In-Reply-To: <20180223170325.997716448@linuxfoundation.org> References: <20180223170325.997716448@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Arnd Bergmann commit fbdf0e28d061708cf18ba0f8e0db5360dc9a15b9 upstream. I got a warning about broken code on ARM64 with 64K pages: drivers/net/vmxnet3/vmxnet3_drv.c: In function 'vmxnet3_rq_init': drivers/net/vmxnet3/vmxnet3_drv.c:1679:29: error: large integer implicitly truncated to unsigned type [-Werror=overflow] rq->buf_info[0][i].len = PAGE_SIZE; 'len' here is a 16-bit integer, so this clearly won't work. I don't think this driver is used much on anything other than x86, so there is no need to fix this properly and we can work around it with a Kconfig dependency to forbid known-broken configurations. qemu in theory supports it on other architectures too, but presumably only for compatibility with x86 guests that also run on vmware. CONFIG_PAGE_SIZE_64KB is used on hexagon, mips, sh and tile, the other symbols are architecture-specific names for the same thing. Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/Kconfig | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -411,6 +411,9 @@ config XEN_NETDEV_BACKEND config VMXNET3 tristate "VMware VMXNET3 ethernet driver" depends on PCI && INET + depends on !(PAGE_SIZE_64KB || ARM64_64K_PAGES || \ + IA64_PAGE_SIZE_64KB || MICROBLAZE_64K_PAGES || \ + PARISC_PAGE_SIZE_64KB || PPC_64K_PAGES) help This driver supports VMware's vmxnet3 virtual ethernet NIC. To compile this driver as a module, choose M here: the