netdev - Re: [PATCH] proc

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Message-ID: <20071028070226.GA23097@martell.zuzino.mipt.ru>
Date:	Sun, 28 Oct 2007 10:02:26 +0300
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Joe Perches <joe@...ches.com>
Cc:	akpm@...l.org, torvalds@...l.org, viro@...iv.linux.org.uk,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	linux-arch@...r.kernel.org
Subject: Re: [PATCH] proc_fs.h redux

On Sat, Oct 27, 2007 at 03:40:04PM -0700, Joe Perches wrote:
> On Sat, 2007-10-27 at 23:47 +0400, Alexey Dobriyan wrote:
> > Remove proc_fs.h from headers that doesn't really need it.
> 
> > --- a/arch/powerpc/kernel/process.c
> > +++ b/arch/powerpc/kernel/process.c
> > @@ -17,6 +17,7 @@
> >  #include <linux/errno.h>
> >  #include <linux/sched.h>
> >  #include <linux/kernel.h>
> > +#include <linux/fs.h>
> 
> Your code doesn't match your patch description.
> 
> You've got new includes of:
> 
> <linux/fs.h>
> <linux/proc_fs.h>
> <linux/err.h>
> <linux/kref.h>
> 
> and forward declarations of
> 
> struct proc_dir_entry;
> struct file_operations;

Removal of header A from header B creates compilation breakages for
files which were getting A indirectly. So you have to complensate in all
such cases.

> As a general rule, I think it better to use includes
> than use naked forward declarations.

Well, we also want faster compilation and less time wasted when
test-compiling patches.
-
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