linux-kernel - Re: linux-next: build failure after merge of the akpm tree

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Message-Id: <20121023130234.827aa5df.akpm@linux-foundation.org>
Date:	Tue, 23 Oct 2012 13:02:34 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Joe Perches <joe@...ches.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Kay Sievers <kay@...y.org>
Subject: Re: linux-next: build failure after merge of the akpm tree

On Tue, 23 Oct 2012 12:51:29 -0700
Joe Perches <joe@...ches.com> wrote:

> > btw, what's up with printk_syslog.h?  It includes two header files which it
> > doesn't need but fails to include the two it *does* need: printk_log.h
> > and types.h.
> > 
> > 
> 
> printk_syslog.c includes kernel.h (it includes types.h)
> and printk_log.h.
> 
> I think printk_syslog.h doesn't need printk_log.h

A general rule is that the header file shouldn't know or care what else
it's includer has included.  Ideally it shouldn't know or care what
else its includees have included, either.

A fun test would be

for i in *.h
	echo $i > foo.c
	make foo.o
done


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