linux-kernel - Re: [PATCH -v7][RFC]: mutex: implement adaptive spinning

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Date:	Fri, 9 Jan 2009 17:39:18 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Harvey Harrison <harvey.harrison@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>, Andi Kleen <andi@...stfloor.org>,
	Chris Mason <chris.mason@...cle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	paulmck@...ux.vnet.ibm.com, Gregory Haskins <ghaskins@...ell.com>,
	Matthew Wilcox <matthew@....cx>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-btrfs <linux-btrfs@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Nick Piggin <npiggin@...e.de>,
	Peter Morreale <pmorreale@...ell.com>,
	Sven Dietrich <SDietrich@...ell.com>
Subject: Re: [PATCH -v7][RFC]: mutex: implement adaptive spinning



On Sat, 10 Jan 2009, Ingo Molnar wrote:
> 
>  - 'static inline' functions in .c files that are not used cause no build 
>    warnings - while if we change them to 'static', we get a 'defined but
>    not used' warning. Hundreds of new warnings in the allyesconfig builds.

Well, duh. Maybe they shouldn't be marked "inline", and maybe they should 
be marked with "__maybe_unused" instead. 

I do not think it makes sense to use "inline" as a way to say "maybe I 
won't use this function".

Yes, it's true that "static inline" won't warn, but hey, as a way to avoid 
a warning it's a pretty bad one.

			Linus
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