[PATCH] dma-buf: add support for compat ioctl
Christian König
deathsimple at vodafone.de
Tue Feb 21 13:59:18 UTC 2017
Am 21.02.2017 um 14:21 schrieb Marek Szyprowski:
> Add compat ioctl support to dma-buf. This lets one to use DMA_BUF_IOCTL_SYNC
> ioctl from 32bit application on 64bit kernel. Data structures for both 32
> and 64bit modes are same, so there is no need for additional translation
> layer.
Well I might be wrong, but IIRC compat_ioctl was just optional and if
not specified unlocked_ioctl was called instead.
If that is true your patch wouldn't have any effect at all.
Regards,
Christian.
>
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> ---
> drivers/dma-buf/dma-buf.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
> index 718f832a5c71..0007b792827b 100644
> --- a/drivers/dma-buf/dma-buf.c
> +++ b/drivers/dma-buf/dma-buf.c
> @@ -325,6 +325,9 @@ static long dma_buf_ioctl(struct file *file,
> .llseek = dma_buf_llseek,
> .poll = dma_buf_poll,
> .unlocked_ioctl = dma_buf_ioctl,
> +#ifdef CONFIG_COMPAT
> + .compat_ioctl = dma_buf_ioctl,
> +#endif
> };
>
> /*
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