linux-kernel - Re: [PATCH] decnet: remove macro-local declarations

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Date:	Thu, 5 Nov 2015 23:21:54 +0100 (CET)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Joe Perches <joe@...ches.com>
cc:	David Miller <davem@...emloft.net>,
	kernel-janitors@...r.kernel.org,
	linux-decnet-user@...ts.sourceforge.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, lkp@...el.com,
	roopa@...ulusnetworks.com, rshearma@...cade.com,
	ebiederm@...ssion.com
Subject: Re: [PATCH] decnet: remove macro-local declarations



On Thu, 5 Nov 2015, Joe Perches wrote:

> On Thu, 2015-11-05 at 20:38 +0100, Julia Lawall wrote:
> > On Thu, 5 Nov 2015, David Miller wrote:
> > > From: Julia Lawall <Julia.Lawall@...6.fr>
> > > Date: Thu,  5 Nov 2015 11:18:16 +0100> 
> > > > Move the variable declarations from the for_nexthops macro to the
> > > > surrounding context, so that it is clear where these variables are
> > > > declared.  This also makes it possible to remove the endfor_nexthops macro.
> > > > 
> > > > This change adds new arguments to the macro for_nexthops.  They are ordered
> > > > such that a pointer to the referenced object comes first, the index in the
> > > > list comes next, and the list itself comes last, roughly in analogy with
> > > > the list_for_each macros.
> []
> > > > This patch takes care of a single file, where the macros are defined
> > > > locally.  If the basic transformation looks OK, I will change the other
> > > > files that either likewise define their own macros or use the macros in
> > > > net/mpls/internal.h.  The potentially affected files are:
> > >  ...
> > > 
> > > This looks fine to me.
> > > 
> > > Please resubmit this when net-next opens back up, which should be
> > > shortly after -rc1.
> > 
> > OK, I'll do the others then too.
> 
> If you do can you please parenthesize the macro arguments?
> 
> #define for_nexthops(nh, nhsel, fi) \
>  	for (nhsel = 0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; (nh)++, (nhsel)++)
> instead of
> 	for(nhsel = 0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; nh++, nhsel++)

OK

> And perhaps a renaming might be better
> 
> 	s/for_nexthops/for_each_nexthop/

OK

Thanks for the suggestions.

julia
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