Hi Christian,
On 2017-02-21 14:59, Christian König wrote:
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.
Well, then why I got -ENOTTY in the 32bit test app for this ioctl on
64bit ARM64 kernel without this patch?
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
