From: Dan Williams <dan.j.williams@intel.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>,
linux-iio@vger.kernel.org, Daniel Vetter <daniel.vetter@ffwll.ch>,
linux-pci@vger.kernel.org, linux-nvme@lists.infradead.org,
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Subject: Re: [PATCH v5 13/29] compat_ioctl: move more drivers to compat_ptr_ioctl
Date: Tue, 30 Jul 2019 13:14:52 -0700 [thread overview]
Message-ID: <CAPcyv4i_nHzV155RcgnAQ189aq2Lfd2g8pA1D5NbZqo9E_u+Dw@mail.gmail.com> (raw)
In-Reply-To: <20190730195819.901457-1-arnd@arndb.de>
On Tue, Jul 30, 2019 at 12:59 PM Arnd Bergmann <arnd@arndb.de> 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 never 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.
>
> Acked-by: Jason Gunthorpe <jgg@mellanox.com>
> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
> Acked-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Acked-by: David Sterba <dsterba@suse.com>
> Acked-by: Darren Hart (VMware) <dvhart@infradead.org>
> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> drivers/nvdimm/bus.c | 4 ++--
[..]
> diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
> index 798c5c4aea9c..6ca142d833ab 100644
> --- a/drivers/nvdimm/bus.c
> +++ b/drivers/nvdimm/bus.c
> @@ -1229,7 +1229,7 @@ static const struct file_operations nvdimm_bus_fops = {
> .owner = THIS_MODULE,
> .open = nd_open,
> .unlocked_ioctl = bus_ioctl,
> - .compat_ioctl = bus_ioctl,
> + .compat_ioctl = compat_ptr_ioctl,
> .llseek = noop_llseek,
> };
>
> @@ -1237,7 +1237,7 @@ static const struct file_operations nvdimm_fops = {
> .owner = THIS_MODULE,
> .open = nd_open,
> .unlocked_ioctl = dimm_ioctl,
> - .compat_ioctl = dimm_ioctl,
> + .compat_ioctl = compat_ptr_ioctl,
> .llseek = noop_llseek,
> };
Acked-by: Dan Williams <dan.j.williams@intel.com>
next prev parent reply other threads:[~2019-07-30 20:15 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-30 19:25 [PATCH v5 00/29] compat_ioctl.c removal, part 1/3 Arnd Bergmann
2019-07-30 19:25 ` [PATCH v5 01/29] fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP Arnd Bergmann
2019-07-30 19:25 ` [PATCH v5 02/29] FIGETBSZ: fix compat Arnd Bergmann
2019-07-30 19:25 ` [PATCH v5 03/29] compat: itanic doesn't have one Arnd Bergmann
2019-07-30 19:25 ` [PATCH v5 04/29] do_vfs_ioctl(): use saner types Arnd Bergmann
2019-07-30 19:25 ` [PATCH v5 05/29] compat: move FS_IOC_RESVSP_32 handling to fs/ioctl.c Arnd Bergmann
2019-07-30 19:25 ` [PATCH v5 06/29] compat_sys_ioctl(): make parallel to do_vfs_ioctl() Arnd Bergmann
2019-07-30 19:25 ` [PATCH v5 07/29] ceph: fix compat_ioctl for ceph_dir_operations Arnd Bergmann
2019-07-30 19:25 ` [PATCH v5 08/29] compat_ioctl: drop FIOQSIZE table entry Arnd Bergmann
2019-07-30 19:25 ` [PATCH v5 09/29] compat_ioctl: pppoe: fix PPPOEIOCSFWD handling Arnd Bergmann
2019-07-30 21:42 ` David Miller
2019-07-30 19:25 ` [PATCH v5 10/29] compat_ioctl: add compat_ptr_ioctl() Arnd Bergmann
2019-07-30 19:25 ` [PATCH v5 11/29] compat_ioctl: move rtc handling into rtc-dev.c Arnd Bergmann
2019-07-30 19:50 ` [PATCH v5 12/29] compat_ioctl: move drivers to compat_ptr_ioctl Arnd Bergmann
2019-07-30 21:43 ` David Miller
2019-07-31 8:37 ` Cornelia Huck
2019-07-30 19:55 ` [PATCH v5 13/29] compat_ioctl: move more " Arnd Bergmann
2019-07-30 19:55 ` [PATCH v5 14/29] compat_ioctl: use correct compat_ptr() translation in drivers Arnd Bergmann
2019-07-30 19:55 ` [PATCH v5 15/29] compat_ioctl: move tape handling into drivers Arnd Bergmann
2019-07-31 10:50 ` Heiko Carstens
2019-07-31 15:47 ` Arnd Bergmann
2019-07-30 19:55 ` [PATCH v5 16/29] compat_ioctl: move ATYFB_CLK handling to atyfb driver Arnd Bergmann
2019-07-30 19:55 ` [PATCH v5 17/29] compat_ioctl: move isdn/capi ioctl translation into driver Arnd Bergmann
2019-07-30 19:55 ` [PATCH v5 18/29] compat_ioctl: move rfcomm handlers " Arnd Bergmann
2019-08-12 16:29 ` Marcel Holtmann
2019-07-30 19:55 ` [PATCH v5 19/29] compat_ioctl: move hci_sock " Arnd Bergmann
2019-08-12 16:29 ` Marcel Holtmann
2019-07-30 20:14 ` Dan Williams [this message]
2019-07-30 20:01 ` [PATCH v5 20/29] compat_ioctl: remove HCIUART handling Arnd Bergmann
2019-07-30 20:01 ` [PATCH v5 21/29] compat_ioctl: remove HIDIO translation Arnd Bergmann
2019-07-30 20:01 ` [PATCH v5 22/29] compat_ioctl: remove translation for sound ioctls Arnd Bergmann
2019-07-30 20:01 ` [PATCH v5 23/29] compat_ioctl: remove IGNORE_IOCTL() Arnd Bergmann
2019-07-30 20:01 ` [PATCH v5 24/29] compat_ioctl: remove /dev/random commands Arnd Bergmann
2019-07-30 20:01 ` [PATCH v5 25/29] compat_ioctl: remove joystick ioctl translation Arnd Bergmann
2019-07-30 20:01 ` [PATCH v5 26/29] compat_ioctl: remove PCI " Arnd Bergmann
2019-07-30 20:01 ` [PATCH v5 27/29] compat_ioctl: remove /dev/raw " Arnd Bergmann
2019-07-30 20:01 ` [PATCH v5 28/29] compat_ioctl: remove last RAID handling code Arnd Bergmann
2019-07-30 20:01 ` [PATCH v5 29/29] compat_ioctl: remove unused convert_in_user macro Arnd Bergmann
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