From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 29F532194D387 for ; Fri, 14 Sep 2018 07:23:27 -0700 (PDT) Date: Fri, 14 Sep 2018 16:23:24 +0200 From: David Sterba Subject: Re: [PATCH v2 05/17] compat_ioctl: move more drivers to generic_compat_ioctl_ptrarg Message-ID: <20180914142324.GI5847@twin.jikos.cz> References: <20180912150142.157913-1-arnd@arndb.de> <20180912151134.436719-1-arnd@arndb.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20180912151134.436719-1-arnd@arndb.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: dsterba@suse.cz Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" To: Arnd Bergmann Cc: linux-fbdev@vger.kernel.org, linux-iio@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-nvme@lists.infradead.org, platform-driver-x86@vger.kernel.org, sparclinux@vger.kernel.org, devel@driverdev.osuosl.org, linux-scsi@vger.kernel.org, linux-nvdimm@lists.01.org, linux-rdma@vger.kernel.org, qat-linux@intel.com, amd-gfx@lists.freedesktop.org, linux-input@vger.kernel.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, dri-devel@lists.freedesktop.org, ceph-devel@vger.kernel.org, Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "David S. Miller" , linux-btrfs@vger.kernel.org, viro@zeniv.linux.org.uk List-ID: On Wed, Sep 12, 2018 at 05:08:52PM +0200, Arnd Bergmann wrote: > The .ioctl and .compat_ioctl file operations have the same prototype so > they can both point to the same function, which works great almost all > the time when all the commands are compatible. > > One exception is the s390 architecture, where a compat pointer is only > 31 bit wide, and converting it into a 64-bit pointer requires calling > compat_ptr(). Most drivers here will ever run in s390, but since we now > have a generic helper for it, it's easy enough to use it consistently. > > I double-checked all these drivers to ensure that all ioctl arguments > are used as pointers or are ignored, but are not interpreted as integer > values. > > Signed-off-by: Arnd Bergmann > --- > fs/btrfs/super.c | 2 +- Acked-by: David Sterba _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm