linux-kernel - Re: [2.6 patch] parisc: "extern inline" -> "static inline" (fwd)

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Message-ID: <20061201164354.GA10549@colo.lackof.org>
Date:	Fri, 1 Dec 2006 09:43:54 -0700
From:	Grant Grundler <grundler@...isc-linux.org>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	Andrew Morton <akpm@...l.org>, matthew@....cx,
	grundler@...isc-linux.org, kyle@...isc-linux.org,
	parisc-linux@...isc-linux.org, linux-kernel@...r.kernel.org
Subject: Re: [2.6 patch] parisc: "extern inline" -> "static inline" (fwd)

On Fri, Dec 01, 2006 at 12:48:11PM +0100, Adrian Bunk wrote:
> "extern inline" generates a warning with -Wmissing-prototypes and I'm 
> currently working on getting the kernel cleaned up for adding this to 
> the CFLAGS since it will help us to avoid a nasty class of runtime 
> errors.


John David Anglin is the hppa/parisc gcc maintainer and has
commented on inline variants last year:
    http://lists.parisc-linux.org/pipermail/parisc-linux/2005-October/027587.html

This makes me think -Wmissing-prototypes is reporting the wrong warning.
ie there is a prototype but no function and no label.
Can you check with gcc folks to see if this is a gcc bug?

The parisc point intentionally switched to "extern inline" at one
point and unless what jda wrote is now incorrect, I'm not inclined
to change it.

> If there are places that really need a forced inline, __always_inline 
> would be the correct solution.

Yes, all the functions marked "extern inline" are expected to get
essentially the same treatment as "always_inline".

thanks,
grant
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