linux-kernel - Re: [PATCH] MIPS: Transform old-style macros to newer "_

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Message-ID: <46572DAF.1000108@zytor.com>
Date:	Fri, 25 May 2007 11:40:47 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Robert P. J. Day" <rpjday@...dspring.com>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: [PATCH] MIPS: Transform old-style macros to newer "__noreturn"
 standard.

Robert P. J. Day wrote:
> Convert old/obsolete NORET_TYPE and ATTRIB_NORET macros to use the
> newer standard of "__noreturn" as defined in compiler-gcc.h.
> 
> Signed-off-by: Robert P. J. Day <rpjday@...dspring.com>

> 1) in a function declaration, the "__noreturn" will go at the end of
> the declaration.
> 
> 2) in a definition, "__noreturn" will go between the return type and
> the function name
> 
> 3) in a function typedef, "__noreturn" will go immediately after the
> return type, just like with definitions.
> 
> 4) if a function definition already includes "__noreturn", there's no
> point in having any external references to it also say the same thing.
> (right?)

This is dumb, though.

"void __noreturn" is redundant.  It would be much cleaner to have a
macro which amounts to "void __attribute__((noreturn))" and use it
instead of giving a return type.

Even "void" as the return type is bogus -- the function never returns so
it doesn't *have* a return type...

	-hpa
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