From: Jason Gunthorpe <jgg@ziepe.ca>
To: Arnd Bergmann <arnd@arndb.de>
Cc: viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"David S. Miller" <davem@davemloft.net>,
devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
qat-linux@intel.com, linux-crypto@vger.kernel.org,
linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
linaro-mm-sig@lists.linaro.org, amd-gfx@lists.freedesktop.org,
linux-input@vger.kernel.org, linux-iio@vger.kernel.org,
linux-rdma@vger.kernel.org, linux-nvdimm@lists.01.org,
linux-nvme@lists.infradead.org, linux-pci@vger.kernel.org,
platform-driver-x86@vger.kernel.org,
linux-remoteproc@vger.kernel.org, sparclinux@vger.kernel.org,
linux-scsi@vger.kernel.org, linux-usb@vger.kernel.org,
linux-fbdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-btrfs@vger.kernel.org, ceph-devel@vger.kernel.org,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH v2 05/17] compat_ioctl: move more drivers to generic_compat_ioctl_ptrarg
Date: Wed, 12 Sep 2018 09:56:39 -0600 [thread overview]
Message-ID: <20180912155639.GF5633@ziepe.ca> (raw)
In-Reply-To: <20180912151134.436719-1-arnd@arndb.de>
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 <arnd@arndb.de>
> drivers/android/binder.c | 2 +-
> drivers/crypto/qat/qat_common/adf_ctl_drv.c | 2 +-
> drivers/dma-buf/dma-buf.c | 4 +---
> drivers/dma-buf/sw_sync.c | 2 +-
> drivers/dma-buf/sync_file.c | 2 +-
> drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 2 +-
> drivers/hid/hidraw.c | 4 +---
> drivers/iio/industrialio-core.c | 2 +-
> drivers/infiniband/core/uverbs_main.c | 4 ++--
> drivers/media/rc/lirc_dev.c | 4 +---
> drivers/mfd/cros_ec_dev.c | 4 +---
> drivers/misc/vmw_vmci/vmci_host.c | 2 +-
> drivers/nvdimm/bus.c | 4 ++--
> drivers/nvme/host/core.c | 2 +-
> drivers/pci/switch/switchtec.c | 2 +-
> drivers/platform/x86/wmi.c | 2 +-
> drivers/rpmsg/rpmsg_char.c | 4 ++--
> drivers/sbus/char/display7seg.c | 2 +-
> drivers/sbus/char/envctrl.c | 4 +---
> drivers/scsi/3w-xxxx.c | 4 +---
> drivers/scsi/cxlflash/main.c | 2 +-
> drivers/scsi/esas2r/esas2r_main.c | 2 +-
> drivers/scsi/pmcraid.c | 4 +---
> drivers/staging/android/ion/ion.c | 4 +---
> drivers/staging/vme/devices/vme_user.c | 2 +-
> drivers/tee/tee_core.c | 2 +-
> drivers/usb/class/cdc-wdm.c | 2 +-
> drivers/usb/class/usbtmc.c | 4 +---
> drivers/video/fbdev/ps3fb.c | 2 +-
> drivers/virt/fsl_hypervisor.c | 2 +-
> fs/btrfs/super.c | 2 +-
> fs/ceph/dir.c | 2 +-
> fs/ceph/file.c | 2 +-
> fs/fuse/dev.c | 2 +-
> fs/notify/fanotify/fanotify_user.c | 2 +-
> fs/userfaultfd.c | 2 +-
> net/rfkill/core.c | 2 +-
> 37 files changed, 40 insertions(+), 58 deletions(-)
> diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
> index 823beca448e1..f4755c1c9cfa 100644
> +++ b/drivers/infiniband/core/uverbs_main.c
> @@ -930,7 +930,7 @@ static const struct file_operations uverbs_fops = {
> .release = ib_uverbs_close,
> .llseek = no_llseek,
> .unlocked_ioctl = ib_uverbs_ioctl,
> - .compat_ioctl = ib_uverbs_ioctl,
> + .compat_ioctl = generic_compat_ioctl_ptrarg,
> };
>
> static const struct file_operations uverbs_mmap_fops = {
> @@ -941,7 +941,7 @@ static const struct file_operations uverbs_mmap_fops = {
> .release = ib_uverbs_close,
> .llseek = no_llseek,
> .unlocked_ioctl = ib_uverbs_ioctl,
> - .compat_ioctl = ib_uverbs_ioctl,
> + .compat_ioctl = generic_compat_ioctl_ptrarg,
> };
>
> static struct ib_client uverbs_client = {
For uverbs:
Acked-by: Jason Gunthorpe <jgg@mellanox.com>
It is very strange, this patch did not appear in the RDMA patchworks,
I almost missed it :|
Jason
next prev parent reply other threads:[~2018-09-12 15:56 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20180912150142.157913-1-arnd@arndb.de>
2018-09-12 15:08 ` [PATCH v2 05/17] compat_ioctl: move more drivers to generic_compat_ioctl_ptrarg Arnd Bergmann
2018-09-12 15:56 ` Jason Gunthorpe [this message]
2018-09-12 15:58 ` Daniel Vetter
2018-09-12 16:01 ` Mauro Carvalho Chehab
2018-09-12 18:13 ` Greg Kroah-Hartman
2018-09-14 14:23 ` David Sterba
2018-09-14 20:35 ` Darren Hart
2018-09-14 20:57 ` Al Viro
2018-09-18 17:51 ` Darren Hart
2018-09-18 17:59 ` Jason Gunthorpe
2018-09-24 20:18 ` Arnd Bergmann
2018-09-24 20:35 ` Jason Gunthorpe
2018-09-24 21:17 ` Arnd Bergmann
2018-09-17 9:33 ` Jonathan Cameron
2018-10-06 7:05 ` Bjorn Andersson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180912155639.GF5633@ziepe.ca \
--to=jgg@ziepe.ca \
--cc=amd-gfx@lists.freedesktop.org \
--cc=arnd@arndb.de \
--cc=ceph-devel@vger.kernel.org \
--cc=davem@davemloft.net \
--cc=devel@driverdev.osuosl.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=gregkh@linuxfoundation.org \
--cc=linaro-mm-sig@lists.linaro.org \
--cc=linux-btrfs@vger.kernel.org \
--cc=linux-crypto@vger.kernel.org \
--cc=linux-fbdev@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-iio@vger.kernel.org \
--cc=linux-input@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-nvdimm@lists.01.org \
--cc=linux-nvme@lists.infradead.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-rdma@vger.kernel.org \
--cc=linux-remoteproc@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=linux-wireless@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=netdev@vger.kernel.org \
--cc=platform-driver-x86@vger.kernel.org \
--cc=qat-linux@intel.com \
--cc=sparclinux@vger.kernel.org \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).