netdev - Re: [PATCH] atomic: add atomic_inc_not_zero

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Date:	Fri, 05 Nov 2010 19:20:24 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Nick Piggin <npiggin@...nel.dk>
Subject: Re: [PATCH] atomic: add atomic_inc_not_zero_hint()

Le vendredi 05 novembre 2010 à 11:08 -0700, Andrew Morton a écrit :
> On Fri, 05 Nov 2010 19:00:46 +0100
> Eric Dumazet <eric.dumazet@...il.com> wrote:
> 
> > Le vendredi 05 novembre 2010 __ 10:20 -0700, Andrew Morton a __crit :
> > 
> > > It totally makes sense to add include/linu/atomic.h for common things. 
> > > Perhaps there's already code in arch/*/include/asm/atomic.h which
> > > should be hoisted up there.  But that can't reliably be done until a
> > > million files have had their #includes switched :(
> > > 
> > 
> > Maybe including <linux/atomic.h> only from the end of various
> > 
> > arch/*/include/asm/atomic.h  ?
> 
> heh, I guess that would work.  It breaks the standard way of doing
> these things (I think?) so let's not go there unless we have a need?
> 
> > In this case, I remove the include <asm/atomic.h> from linux/atomic.h
> 
> Oh.  Why?  I thought it was better the previous, standard way: thou
> shalt henceforth include liunx/atomic.h, not asm/atomic.h.  And the
> presence of linux/atomic.h will in fact trigger the checkpatch warning
> telling people to use that when they try to use asm/atomic.h.

Hmm, if we want to move the common stuff from
arch/*/include/asm/atomic.h to this new file (include/linux/atomic.h),
then we would have to change hundred of 

#include <asm/atomic.h> 

to

#include <linux/atomic.h> 

This seems a big task to me ?

Or just make a whole tree replace ?



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