linux-kernel - Re: whose job is it to include various header files?

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Message-ID: <alpine.LFD.1.00.0803132149320.11864@localhost.localdomain>
Date:	Thu, 13 Mar 2008 21:53:01 -0400 (EDT)
From:	"Robert P. J. Day" <rpjday@...shcourse.ca>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
cc:	Jesper Juhl <jesper.juhl@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: whose job is it to include various header files?

On Fri, 14 Mar 2008, Jan Engelhardt wrote:

>
> On Mar 14 2008 00:53, Jesper Juhl wrote:
> >I agree with you completely. A file should explicitly include
> >headers for the stuff it uses and not rely on implicit includes
> >done elsewhere. Cleaning that up is going to touch a lot of files
> >though for no real short term gain (there is a long term gain of
> >maintainability though), so it's going to be a loveless job :(
>
> But straightforward. You nuke the complete #include list of a .h/.c
> file and "rebuild" it by hand, by looking at the code the .h/.c file
> provides/uses and selecting appropriate #includes.

well, yes, that would certainly do it, but i'm not that ambitious.
:-)  actually, what i'm testing now is deleting the two superfluous
includes from <linux/percpu.h>:

  #include <linus/slab.h>
  #include <linux/string.h>

doing "make allyesconfig" on x86, watching where the compile fails,
fixing that file, and noticing that errors fall into a fairly small
set of localized clumps, so i'll just collect them and submit them.
there's actually not that many.  patches to follow shortly.

rday
--



========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry:
    Have classroom, will lecture.

http://crashcourse.ca                          Waterloo, Ontario, CANADA
========================================================================
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