linux-kernel - Re: [PATCH 02/10] intel: Remove extern from function prototypes

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Message-ID: <1380061346.17366.1.camel@joe-AO722>
Date:	Tue, 24 Sep 2013 15:22:26 -0700
From:	Joe Perches <joe@...ches.com>
To:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Bruce Allan <bruce.w.allan@...el.com>,
	Carolyn Wyborny <carolyn.wyborny@...el.com>,
	Don Skidmore <donald.c.skidmore@...el.com>,
	Greg Rose <gregory.v.rose@...el.com>,
	Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>,
	Alex Duyck <alexander.h.duyck@...el.com>,
	John Ronciak <john.ronciak@...el.com>,
	Tushar Dave <tushar.n.dave@...el.com>,
	e1000-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/10] intel: Remove extern from function prototypes


On Tue, 2013-09-24 at 15:07 -0700, Jeff Kirsher wrote:
> On Tue, 2013-09-24 at 14:09 -0700, Joe Perches wrote:
> > There are a mix of function prototypes with and without extern
> > in the kernel sources.  Standardize on not using extern for
> > function prototypes.
> > 
> > Function prototypes don't need to be written with extern.
> > extern is assumed by the compiler.  Its use is as unnecessary as
> > using auto to declare automatic/local variables in a block.
> 
> So you are able to confirm that all compilers make this assumption
> correctly?  The initial reason for using extern was because not all
> compilers made the assumption or made it correctly.

No, I didn't bother.

Any current compilers already do make this assumption
valid as it's been part of the c spec since 1989 and
prototypes without extern already are the predominate
form in .h files for linux kernel sources.

Even in drivers/net/ethernet/intel/... there are more
prototypes without extern than with extern.



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