Re: [PATCH] ion_test: Add compat_ioctl support (v2)

[Colin Cross]

On Thu, Dec 19, 2013 at 3:56 PM, John Stultz <john.stultz@xxxxxxxxxx> wrote:
> Prior to subitting this, Colin reworked the compat_ioctl support
> for the ion_test driver, moving the structure to be the same size
> on both 32 and 64 bit architectures.
>
> Two small things were left out. The compat_ioctl ptr assignment,
> and the fact that despite having uniform sized types in the
> structure, the structure pads out to different sizes on different
> arches.
>
> This patch resolves this issue by adding a padding entry after
> the write flag, and adding the compat_ioctl ptr.
>
> Changes in v2:
> - Add a padding int rather then making write a u64
>
> Cc: Colin Cross <ccross@xxxxxxxxxxx>
> Cc: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Android Kernel Team <kernel-team@xxxxxxxxxxx>
> Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
> ---
>  drivers/staging/android/ion/ion_test.c  | 1 +
>  drivers/staging/android/uapi/ion_test.h | 1 +
>  2 files changed, 2 insertions(+)
>
> diff --git a/drivers/staging/android/ion/ion_test.c b/drivers/staging/android/ion/ion_test.c
> index 3e20349..654acb5 100644
> --- a/drivers/staging/android/ion/ion_test.c
> +++ b/drivers/staging/android/ion/ion_test.c
> @@ -231,6 +231,7 @@ static int ion_test_release(struct inode *inode, struct file *file)
>  static const struct file_operations ion_test_fops = {
>         .owner = THIS_MODULE,
>         .unlocked_ioctl = ion_test_ioctl,
> +       .compat_ioctl = ion_test_ioctl,
>         .open = ion_test_open,
>         .release = ion_test_release,
>  };
> diff --git a/drivers/staging/android/uapi/ion_test.h b/drivers/staging/android/uapi/ion_test.h
> index 614d1e3..ffef06f 100644
> --- a/drivers/staging/android/uapi/ion_test.h
> +++ b/drivers/staging/android/uapi/ion_test.h
> @@ -32,6 +32,7 @@ struct ion_test_rw_data {
>         __u64 offset;
>         __u64 size;
>         int write;
> +       int __padding;
>  };
>
>  #define ION_IOC_MAGIC          'I'
> --
> 1.8.3.2
>
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Acked-by: Colin Cross <ccross@xxxxxxxxxxx>
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