Re: [PATCH] security_sk_free void return fixup

[Linus Torvalds <torvalds@osdl.org>]

On Tue, 15 Jun 2004, Chris Wright wrote:
>
>   CHECK   net/core/sock.c
> include/linux/security.h:2636:39: warning: return expression in void function
>   CC      net/core/sock.o

I'm going to remove this warning from sparse. Apparently it is valid C99, 
and somebody (I think Richard Henderson) made the excellent point that it 
allows for type-independent code where you do something like

	mytype myfunc1(xxx);

	mytype myfunc2(xxx)
	{
		...
		return myfunc1(...);
	}

and it just works regardless of what type it is. 

sparse will obviously warn about expressions with non-void types being 
returned from a void function, but the case where the expression exists 
and has the right type should be ok.

I'm not sure it's wonderful C in general, but I certainly can't claim it 
is actively offensive, and since gcc accepts it and we have these things 
in the kernel, why complain? 

		Linus