On 11/05/14 16:15, Boris Brezillon wrote:

On Wed, 5 Nov 2014 17:08:15 +0200
Sakari Ailus [off-list ref] wrote:

quoted

Hi Boris,

On Tue, Nov 04, 2014 at 10:55:06AM +0100, Boris Brezillon wrote:

quoted

The v4l2_mbus_pixelcode enum (or its values) should be replaced by the
media_bus_format enum.
Keep this enum in v4l2-mediabus.h and create a new header containing
the v4l2_mbus_framefmt struct definition (which is not deprecated) so
that we can add a #warning statement in v4l2-mediabus.h and hopefully
encourage users to move to the new definitions.

Replace inclusion of v4l2-mediabus.h with v4l2-mbus.h in all common headers
and update the documentation Makefile to parse v4l2-mbus.h instead of
v4l2-mediabus.h.

Signed-off-by: Boris Brezillon <redacted>
---
 Documentation/DocBook/media/Makefile |  2 +-
 include/media/v4l2-mediabus.h        |  2 +-
 include/uapi/linux/Kbuild            |  1 +
 include/uapi/linux/v4l2-mbus.h       | 35 +++++++++++++++++++++++++++++++++++
 include/uapi/linux/v4l2-mediabus.h   | 26 ++++----------------------

I would keep the original file name, even if the compatibility definitions
are there. I don't see any harm in having them around as well.

That's the part I was not sure about.
The goal of this patch (and the following ones) is to deprecate
v4l2_mbus_pixelcode enum and its values by adding a #warning when
v4l2-mediabus.h file is included, thus encouraging people to use new
definitions.

Since v4l2-mediabus.h contains struct v4l2_mbus_framefmt this header remains
a legal header, so you can't use #warning here in any case.

Regards,

	Hans

Do you see another solution to generate such warnings at compilation
time ?