linux-kernel - [Q] compiler no longer warning about undeclared struct?

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Message-ID: <Pine.LNX.4.64.1107271947490.7435@axis700.grange>
Date:	Wed, 27 Jul 2011 19:57:40 +0200 (CEST)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	linux-kernel@...r.kernel.org
Subject: [Q] compiler no longer warning about undeclared struct?

Hi

I just ran across a driver in the kernel (drivers/media/video/ov2640.c, 
struct ov2640_priv::info), that does something like

struct xx {
	struct yy *y;
};

static void z(void)
{
	struct xx *x;
	void *p;

	x = ...;
	p = ...;
	x->y = p;
}

where "struct yy" is nowhere declared, and the compiler happily swallows 
this... Shouldn't it complain? Didn't it complain before?

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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