[media] v4l: Add custom compat_ioctl32 operation

Drivers implementing custom ioctls need to handle 32-bit/64-bit
compatibility themselves. Provide them with a way to do so.

To avoid circular module dependencies, merge the v4l2-compat-ioctl32
module into videodev. There is no point in keeping them separate, as the
v4l2_compat_ioctl32() function is required by videodev if CONFIG_COMPAT
is set anyway.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index c7c40f1d2624..96d22215cc88 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -62,6 +62,9 @@ struct v4l2_file_operations {
         unsigned int (*poll) (struct file *, struct poll_table_struct *);
         long (*ioctl) (struct file *, unsigned int, unsigned long);
         long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
+#ifdef CONFIG_COMPAT
+        long (*compat_ioctl32) (struct file *, unsigned int, unsigned long);
+#endif
         unsigned long (*get_unmapped_area) (struct file *, unsigned long,
                                 unsigned long, unsigned long, unsigned long);
         int (*mmap) (struct file *, struct vm_area_struct *);