linux-kernel - Re: [PATCH] linux/fs.h - Convert debug functions declared inline __attribute__((format (printf,x,y) to statement expression macros

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Date:	Thu, 28 Feb 2008 03:42:37 -0500
From:	Jakub Jelinek <jakub@...hat.com>
To:	Jan Hubicka <hubicka@....cz>
Cc:	David Rientjes <rientjes@...gle.com>,
	Joe Perches <joe@...ches.com>, Matthew Wilcox <matthew@....cx>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-fsdevel@...r.kernel.org, gcc@....gnu.org,
	zadeck@...uralbridge.com
Subject: Re: [PATCH] linux/fs.h - Convert debug functions declared inline  __attribute__((format (printf,x,y) to statement expression macros

On Thu, Feb 28, 2008 at 12:58:35AM +0100, Jan Hubicka wrote:
> We probably also can simply allow inlining variadic functions not
> calling va_start.  I must say that this option appeared to me but I was
> unable to think of any sane use case.  This probably is one ;)

We already allow inlining variadic functions not calling va_start, already
3.2.x did that and so do all following gccs.  In 4.3+
__builtin_va_arg_pack{,_len} support was added, so that you can even pass
the ... arguments to variable length functions, query their count etc.

	Jakub
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