Re: [PATCH v3 09/26] compat_ioctl: move drivers to compat_ptr_ioctl

From: Michael S. Tsirkin
Date: Fri Apr 19 2019 - 19:16:49 EST

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On Tue, Apr 16, 2019 at 10:19:47PM +0200, Arnd Bergmann wrote:
> Each of these drivers has a copy of the same trivial helper function to
> convert the pointer argument and then call the native ioctl handler.
>
> We now have a generic implementation of that, so use it.
>
> Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
> Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>

> ---
> drivers/char/ppdev.c | 12 +---------
> drivers/char/tpm/tpm_vtpm_proxy.c | 12 +---------
> drivers/firewire/core-cdev.c | 12 +---------
> drivers/hid/usbhid/hiddev.c | 11 +--------
> drivers/hwtracing/stm/core.c | 12 +---------
> drivers/misc/mei/main.c | 22 +----------------
> drivers/mtd/ubi/cdev.c | 36 +++-------------------------
> drivers/net/tap.c | 12 +---------
> drivers/staging/pi433/pi433_if.c | 12 +---------
> drivers/usb/core/devio.c | 16 +------------
> drivers/vfio/vfio.c | 39 +++----------------------------
> drivers/vhost/net.c | 12 +---------
> drivers/vhost/scsi.c | 12 +---------
> drivers/vhost/test.c | 12 +---------
> drivers/vhost/vsock.c | 12 +---------
> fs/fat/file.c | 13 +----------
> 16 files changed, 20 insertions(+), 237 deletions(-)
>
> diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c
> index 1ae77b41050a..e96c8d9623e0 100644
> --- a/drivers/char/ppdev.c
> +++ b/drivers/char/ppdev.c
> @@ -674,14 +674,6 @@ static long pp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> return ret;
> }
>
> -#ifdef CONFIG_COMPAT
> -static long pp_compat_ioctl(struct file *file, unsigned int cmd,
> - unsigned long arg)
> -{
> - return pp_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
> -}
> -#endif
> -
> static int pp_open(struct inode *inode, struct file *file)
> {
> unsigned int minor = iminor(inode);
> @@ -790,9 +782,7 @@ static const struct file_operations pp_fops = {
> .write = pp_write,
> .poll = pp_poll,
> .unlocked_ioctl = pp_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = pp_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .open = pp_open,
> .release = pp_release,
> };
> diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c
> index d74f3de74ae6..fb845f0a430b 100644
> --- a/drivers/char/tpm/tpm_vtpm_proxy.c
> +++ b/drivers/char/tpm/tpm_vtpm_proxy.c
> @@ -675,20 +675,10 @@ static long vtpmx_fops_ioctl(struct file *f, unsigned int ioctl,
> }
> }
>
> -#ifdef CONFIG_COMPAT
> -static long vtpmx_fops_compat_ioctl(struct file *f, unsigned int ioctl,
> - unsigned long arg)
> -{
> - return vtpmx_fops_ioctl(f, ioctl, (unsigned long)compat_ptr(arg));
> -}
> -#endif
> -
> static const struct file_operations vtpmx_fops = {
> .owner = THIS_MODULE,
> .unlocked_ioctl = vtpmx_fops_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = vtpmx_fops_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .llseek = noop_llseek,
> };
>
> diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
> index 16a7045736a9..fb934680fdd3 100644
> --- a/drivers/firewire/core-cdev.c
> +++ b/drivers/firewire/core-cdev.c
> @@ -1659,14 +1659,6 @@ static long fw_device_op_ioctl(struct file *file,
> return dispatch_ioctl(file->private_data, cmd, (void __user *)arg);
> }
>
> -#ifdef CONFIG_COMPAT
> -static long fw_device_op_compat_ioctl(struct file *file,
> - unsigned int cmd, unsigned long arg)
> -{
> - return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg));
> -}
> -#endif
> -
> static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
> {
> struct client *client = file->private_data;
> @@ -1808,7 +1800,5 @@ const struct file_operations fw_device_ops = {
> .mmap = fw_device_op_mmap,
> .release = fw_device_op_release,
> .poll = fw_device_op_poll,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = fw_device_op_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> };
> diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
> index a746017fac17..ef4a1cd389d6 100644
> --- a/drivers/hid/usbhid/hiddev.c
> +++ b/drivers/hid/usbhid/hiddev.c
> @@ -855,13 +855,6 @@ static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> return r;
> }
>
> -#ifdef CONFIG_COMPAT
> -static long hiddev_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> -{
> - return hiddev_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
> -}
> -#endif
> -
> static const struct file_operations hiddev_fops = {
> .owner = THIS_MODULE,
> .read = hiddev_read,
> @@ -871,9 +864,7 @@ static const struct file_operations hiddev_fops = {
> .release = hiddev_release,
> .unlocked_ioctl = hiddev_ioctl,
> .fasync = hiddev_fasync,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = hiddev_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .llseek = noop_llseek,
> };
>
> diff --git a/drivers/hwtracing/stm/core.c b/drivers/hwtracing/stm/core.c
> index c7ba8acfd4d5..454da259f144 100644
> --- a/drivers/hwtracing/stm/core.c
> +++ b/drivers/hwtracing/stm/core.c
> @@ -840,23 +840,13 @@ stm_char_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> return err;
> }
>
> -#ifdef CONFIG_COMPAT
> -static long
> -stm_char_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> -{
> - return stm_char_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
> -}
> -#else
> -#define stm_char_compat_ioctl NULL
> -#endif
> -
> static const struct file_operations stm_fops = {
> .open = stm_char_open,
> .release = stm_char_release,
> .write = stm_char_write,
> .mmap = stm_char_mmap,
> .unlocked_ioctl = stm_char_ioctl,
> - .compat_ioctl = stm_char_compat_ioctl,
> + .compat_ioctl = compat_ptr_ioctl,
> .llseek = no_llseek,
> };
>
> diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
> index 87281b3695e6..cc6af92cdef0 100644
> --- a/drivers/misc/mei/main.c
> +++ b/drivers/misc/mei/main.c
> @@ -535,24 +535,6 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
> return rets;
> }
>
> -/**
> - * mei_compat_ioctl - the compat IOCTL function
> - *
> - * @file: pointer to file structure
> - * @cmd: ioctl command
> - * @data: pointer to mei message structure
> - *
> - * Return: 0 on success , <0 on error
> - */
> -#ifdef CONFIG_COMPAT
> -static long mei_compat_ioctl(struct file *file,
> - unsigned int cmd, unsigned long data)
> -{
> - return mei_ioctl(file, cmd, (unsigned long)compat_ptr(data));
> -}
> -#endif
> -
> -
> /**
> * mei_poll - the poll function
> *
> @@ -855,9 +837,7 @@ static const struct file_operations mei_fops = {
> .owner = THIS_MODULE,
> .read = mei_read,
> .unlocked_ioctl = mei_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = mei_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .open = mei_open,
> .release = mei_release,
> .write = mei_write,
> diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
> index 947a8adbc799..265d34fa3efa 100644
> --- a/drivers/mtd/ubi/cdev.c
> +++ b/drivers/mtd/ubi/cdev.c
> @@ -1091,36 +1091,6 @@ static long ctrl_cdev_ioctl(struct file *file, unsigned int cmd,
> return err;
> }
>
> -#ifdef CONFIG_COMPAT
> -static long vol_cdev_compat_ioctl(struct file *file, unsigned int cmd,
> - unsigned long arg)
> -{
> - unsigned long translated_arg = (unsigned long)compat_ptr(arg);
> -
> - return vol_cdev_ioctl(file, cmd, translated_arg);
> -}
> -
> -static long ubi_cdev_compat_ioctl(struct file *file, unsigned int cmd,
> - unsigned long arg)
> -{
> - unsigned long translated_arg = (unsigned long)compat_ptr(arg);
> -
> - return ubi_cdev_ioctl(file, cmd, translated_arg);
> -}
> -
> -static long ctrl_cdev_compat_ioctl(struct file *file, unsigned int cmd,
> - unsigned long arg)
> -{
> - unsigned long translated_arg = (unsigned long)compat_ptr(arg);
> -
> - return ctrl_cdev_ioctl(file, cmd, translated_arg);
> -}
> -#else
> -#define vol_cdev_compat_ioctl NULL
> -#define ubi_cdev_compat_ioctl NULL
> -#define ctrl_cdev_compat_ioctl NULL
> -#endif
> -
> /* UBI volume character device operations */
> const struct file_operations ubi_vol_cdev_operations = {
> .owner = THIS_MODULE,
> @@ -1131,7 +1101,7 @@ const struct file_operations ubi_vol_cdev_operations = {
> .write = vol_cdev_write,
> .fsync = vol_cdev_fsync,
> .unlocked_ioctl = vol_cdev_ioctl,
> - .compat_ioctl = vol_cdev_compat_ioctl,
> + .compat_ioctl = compat_ptr_ioctl,
> };
>
> /* UBI character device operations */
> @@ -1139,13 +1109,13 @@ const struct file_operations ubi_cdev_operations = {
> .owner = THIS_MODULE,
> .llseek = no_llseek,
> .unlocked_ioctl = ubi_cdev_ioctl,
> - .compat_ioctl = ubi_cdev_compat_ioctl,
> + .compat_ioctl = compat_ptr_ioctl,
> };
>
> /* UBI control character device operations */
> const struct file_operations ubi_ctrl_cdev_operations = {
> .owner = THIS_MODULE,
> .unlocked_ioctl = ctrl_cdev_ioctl,
> - .compat_ioctl = ctrl_cdev_compat_ioctl,
> + .compat_ioctl = compat_ptr_ioctl,
> .llseek = no_llseek,
> };
> diff --git a/drivers/net/tap.c b/drivers/net/tap.c
> index 2ea9b4976f4a..ebe425e65992 100644
> --- a/drivers/net/tap.c
> +++ b/drivers/net/tap.c
> @@ -1123,14 +1123,6 @@ static long tap_ioctl(struct file *file, unsigned int cmd,
> }
> }
>
> -#ifdef CONFIG_COMPAT
> -static long tap_compat_ioctl(struct file *file, unsigned int cmd,
> - unsigned long arg)
> -{
> - return tap_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
> -}
> -#endif
> -
> static const struct file_operations tap_fops = {
> .owner = THIS_MODULE,
> .open = tap_open,
> @@ -1140,9 +1132,7 @@ static const struct file_operations tap_fops = {
> .poll = tap_poll,
> .llseek = no_llseek,
> .unlocked_ioctl = tap_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = tap_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> };
>
> static int tap_get_user_xdp(struct tap_queue *q, struct xdp_buff *xdp)
> diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c
> index b2314636dc89..ab7dfc7c2917 100644
> --- a/drivers/staging/pi433/pi433_if.c
> +++ b/drivers/staging/pi433/pi433_if.c
> @@ -935,16 +935,6 @@ pi433_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> return retval;
> }
>
> -#ifdef CONFIG_COMPAT
> -static long
> -pi433_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> -{
> - return pi433_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
> -}
> -#else
> -#define pi433_compat_ioctl NULL
> -#endif /* CONFIG_COMPAT */
> -
> /*-------------------------------------------------------------------------*/
>
> static int pi433_open(struct inode *inode, struct file *filp)
> @@ -1101,7 +1091,7 @@ static const struct file_operations pi433_fops = {
> .write = pi433_write,
> .read = pi433_read,
> .unlocked_ioctl = pi433_ioctl,
> - .compat_ioctl = pi433_compat_ioctl,
> + .compat_ioctl = compat_ptr_ioctl,
> .open = pi433_open,
> .release = pi433_release,
> .llseek = no_llseek,
> diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
> index fa783531ee88..d75052b36584 100644
> --- a/drivers/usb/core/devio.c
> +++ b/drivers/usb/core/devio.c
> @@ -2568,18 +2568,6 @@ static long usbdev_ioctl(struct file *file, unsigned int cmd,
> return ret;
> }
>
> -#ifdef CONFIG_COMPAT
> -static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
> - unsigned long arg)
> -{
> - int ret;
> -
> - ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
> -
> - return ret;
> -}
> -#endif
> -
> /* No kernel lock - fine */
> static __poll_t usbdev_poll(struct file *file,
> struct poll_table_struct *wait)
> @@ -2603,9 +2591,7 @@ const struct file_operations usbdev_file_operations = {
> .read = usbdev_read,
> .poll = usbdev_poll,
> .unlocked_ioctl = usbdev_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = usbdev_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .mmap = usbdev_mmap,
> .open = usbdev_open,
> .release = usbdev_release,
> diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
> index a3030cdf3c18..a5efe82584a5 100644
> --- a/drivers/vfio/vfio.c
> +++ b/drivers/vfio/vfio.c
> @@ -1200,15 +1200,6 @@ static long vfio_fops_unl_ioctl(struct file *filep,
> return ret;
> }
>
> -#ifdef CONFIG_COMPAT
> -static long vfio_fops_compat_ioctl(struct file *filep,
> - unsigned int cmd, unsigned long arg)
> -{
> - arg = (unsigned long)compat_ptr(arg);
> - return vfio_fops_unl_ioctl(filep, cmd, arg);
> -}
> -#endif /* CONFIG_COMPAT */
> -
> static int vfio_fops_open(struct inode *inode, struct file *filep)
> {
> struct vfio_container *container;
> @@ -1291,9 +1282,7 @@ static const struct file_operations vfio_fops = {
> .read = vfio_fops_read,
> .write = vfio_fops_write,
> .unlocked_ioctl = vfio_fops_unl_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = vfio_fops_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .mmap = vfio_fops_mmap,
> };
>
> @@ -1572,15 +1561,6 @@ static long vfio_group_fops_unl_ioctl(struct file *filep,
> return ret;
> }
>
> -#ifdef CONFIG_COMPAT
> -static long vfio_group_fops_compat_ioctl(struct file *filep,
> - unsigned int cmd, unsigned long arg)
> -{
> - arg = (unsigned long)compat_ptr(arg);
> - return vfio_group_fops_unl_ioctl(filep, cmd, arg);
> -}
> -#endif /* CONFIG_COMPAT */
> -
> static int vfio_group_fops_open(struct inode *inode, struct file *filep)
> {
> struct vfio_group *group;
> @@ -1636,9 +1616,7 @@ static int vfio_group_fops_release(struct inode *inode, struct file *filep)
> static const struct file_operations vfio_group_fops = {
> .owner = THIS_MODULE,
> .unlocked_ioctl = vfio_group_fops_unl_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = vfio_group_fops_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .open = vfio_group_fops_open,
> .release = vfio_group_fops_release,
> };
> @@ -1703,24 +1681,13 @@ static int vfio_device_fops_mmap(struct file *filep, struct vm_area_struct *vma)
> return device->ops->mmap(device->device_data, vma);
> }
>
> -#ifdef CONFIG_COMPAT
> -static long vfio_device_fops_compat_ioctl(struct file *filep,
> - unsigned int cmd, unsigned long arg)
> -{
> - arg = (unsigned long)compat_ptr(arg);
> - return vfio_device_fops_unl_ioctl(filep, cmd, arg);
> -}
> -#endif /* CONFIG_COMPAT */
> -
> static const struct file_operations vfio_device_fops = {
> .owner = THIS_MODULE,
> .release = vfio_device_fops_release,
> .read = vfio_device_fops_read,
> .write = vfio_device_fops_write,
> .unlocked_ioctl = vfio_device_fops_unl_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = vfio_device_fops_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .mmap = vfio_device_fops_mmap,
> };
>
> diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
> index df51a35cf537..1642b3573230 100644
> --- a/drivers/vhost/net.c
> +++ b/drivers/vhost/net.c
> @@ -1765,14 +1765,6 @@ static long vhost_net_ioctl(struct file *f, unsigned int ioctl,
> }
> }
>
> -#ifdef CONFIG_COMPAT
> -static long vhost_net_compat_ioctl(struct file *f, unsigned int ioctl,
> - unsigned long arg)
> -{
> - return vhost_net_ioctl(f, ioctl, (unsigned long)compat_ptr(arg));
> -}
> -#endif
> -
> static ssize_t vhost_net_chr_read_iter(struct kiocb *iocb, struct iov_iter *to)
> {
> struct file *file = iocb->ki_filp;
> @@ -1808,9 +1800,7 @@ static const struct file_operations vhost_net_fops = {
> .write_iter = vhost_net_chr_write_iter,
> .poll = vhost_net_chr_poll,
> .unlocked_ioctl = vhost_net_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = vhost_net_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .open = vhost_net_open,
> .llseek = noop_llseek,
> };
> diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
> index 618fb6461017..f9b14c39d89b 100644
> --- a/drivers/vhost/scsi.c
> +++ b/drivers/vhost/scsi.c
> @@ -1721,21 +1721,11 @@ vhost_scsi_ioctl(struct file *f,
> }
> }
>
> -#ifdef CONFIG_COMPAT
> -static long vhost_scsi_compat_ioctl(struct file *f, unsigned int ioctl,
> - unsigned long arg)
> -{
> - return vhost_scsi_ioctl(f, ioctl, (unsigned long)compat_ptr(arg));
> -}
> -#endif
> -
> static const struct file_operations vhost_scsi_fops = {
> .owner = THIS_MODULE,
> .release = vhost_scsi_release,
> .unlocked_ioctl = vhost_scsi_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = vhost_scsi_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .open = vhost_scsi_open,
> .llseek = noop_llseek,
> };
> diff --git a/drivers/vhost/test.c b/drivers/vhost/test.c
> index 40589850eb33..61d4d98c8f70 100644
> --- a/drivers/vhost/test.c
> +++ b/drivers/vhost/test.c
> @@ -298,21 +298,11 @@ static long vhost_test_ioctl(struct file *f, unsigned int ioctl,
> }
> }
>
> -#ifdef CONFIG_COMPAT
> -static long vhost_test_compat_ioctl(struct file *f, unsigned int ioctl,
> - unsigned long arg)
> -{
> - return vhost_test_ioctl(f, ioctl, (unsigned long)compat_ptr(arg));
> -}
> -#endif
> -
> static const struct file_operations vhost_test_fops = {
> .owner = THIS_MODULE,
> .release = vhost_test_release,
> .unlocked_ioctl = vhost_test_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = vhost_test_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .open = vhost_test_open,
> .llseek = noop_llseek,
> };
> diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
> index bb5fc0e9fbc2..9a86202678b6 100644
> --- a/drivers/vhost/vsock.c
> +++ b/drivers/vhost/vsock.c
> @@ -716,23 +716,13 @@ static long vhost_vsock_dev_ioctl(struct file *f, unsigned int ioctl,
> }
> }
>
> -#ifdef CONFIG_COMPAT
> -static long vhost_vsock_dev_compat_ioctl(struct file *f, unsigned int ioctl,
> - unsigned long arg)
> -{
> - return vhost_vsock_dev_ioctl(f, ioctl, (unsigned long)compat_ptr(arg));
> -}
> -#endif
> -
> static const struct file_operations vhost_vsock_fops = {
> .owner = THIS_MODULE,
> .open = vhost_vsock_dev_open,
> .release = vhost_vsock_dev_release,
> .llseek = noop_llseek,
> .unlocked_ioctl = vhost_vsock_dev_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = vhost_vsock_dev_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> };
>
> static struct miscdevice vhost_vsock_misc = {
> diff --git a/fs/fat/file.c b/fs/fat/file.c
> index b3bed32946b1..f173d9261115 100644
> --- a/fs/fat/file.c
> +++ b/fs/fat/file.c
> @@ -171,15 +171,6 @@ long fat_generic_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
> }
> }
>
> -#ifdef CONFIG_COMPAT
> -static long fat_generic_compat_ioctl(struct file *filp, unsigned int cmd,
> - unsigned long arg)
> -
> -{
> - return fat_generic_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
> -}
> -#endif
> -
> static int fat_file_release(struct inode *inode, struct file *filp)
> {
> if ((filp->f_mode & FMODE_WRITE) &&
> @@ -209,9 +200,7 @@ const struct file_operations fat_file_operations = {
> .mmap = generic_file_mmap,
> .release = fat_file_release,
> .unlocked_ioctl = fat_generic_ioctl,
> -#ifdef CONFIG_COMPAT
> - .compat_ioctl = fat_generic_compat_ioctl,
> -#endif
> + .compat_ioctl = compat_ptr_ioctl,
> .fsync = fat_file_fsync,
> .splice_read = generic_file_splice_read,
> .splice_write = iter_file_splice_write,
> --
> 2.20.0

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