linux-kernel - Re: [PATCH 41/45] include/uapi/sound/emu10k1.h: hide gpr_valid, tram_valid and code

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Date:	Wed, 11 Mar 2015 07:11:18 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Mikko Rapeli <mikko.rapeli@....fi>
Cc:	linux-kernel@...r.kernel.org, Jaroslav Kysela <perex@...ex.cz>,
	alsa-devel@...a-project.org, linux-api@...r.kernel.org
Subject: Re: [PATCH 41/45] include/uapi/sound/emu10k1.h: hide gpr_valid, tram_valid and code_valid in userspace

At Wed, 11 Mar 2015 03:22:04 +0200,
Mikko Rapeli wrote:
> 
> On Tue, Feb 17, 2015 at 07:27:38AM +0100, Takashi Iwai wrote:
> > At Tue, 17 Feb 2015 00:05:44 +0100,
> > Mikko Rapeli wrote:
> > > 
> > > The DECLARE_BITMAP macro is not available in userspace headers.
> > > Fixes userspace compile error:
> > > error: expected specifier-qualifier-list before ‘DECLARE_BITMAP’
> > 
> > It's nonsense.  This results in an incompatible structure, thus ABI
> > would be broken completely (actually this will break the compile of
> > ld10k1).
> 
> None of the exported headers after 'make headers_install' have definition
> of DECLARE_BITMAP macro. It is defined in include/linux/types.h which is
> different from include/uapi/linux/types.h and missing this definition and
> a few other things.
> 
> One option would be add DECLARE_BITMAP macro to include/uapi/linux/types.h
> and add include/linux/bitops.h to uapi.
> 
> Thoughts?

Are there any other headers like that?  If this is the only one, leave
it as is.  The only program that reads this are some alsa-tools ones
and they have already own DECLARE_BITMAP() definition.  Adding the
extra definition here will even break the compilation out of sudden.


Takashi
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