linux-kernel - Re: [PATCH 1/1] headers: fix circular dependency between linux/sched.h and linux/wait.h

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Date:	Mon, 21 Feb 2011 14:30:49 +0200
From:	Felipe Balbi <balbi@...com>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	David Cohen <dacohen@...il.com>, linux-kernel@...r.kernel.org,
	mingo@...e.hu, peterz@...radead.org, linux-omap@...r.kernel.org,
	linux-media@...r.kernel.org
Subject: Re: [PATCH 1/1] headers: fix circular dependency between
 linux/sched.h and linux/wait.h

On Mon, Feb 21, 2011 at 01:05:51PM +0200, Alexey Dobriyan wrote:
> On Mon, Feb 21, 2011 at 12:20 PM, David Cohen <dacohen@...il.com> wrote:
> > Currently sched.h and wait.h have circular dependency between both.
> > wait.h defines macros wake_up*() which use macros TASK_* defined by
> > sched.h. But as sched.h indirectly includes wait.h, such wait.h header
> > file can't include sched.h too. The side effect is when some file
> > includes wait.h and tries to use its wake_up*() macros, it's necessary
> > to include sched.h also.
> > This patch moves all TASK_* macros from linux/sched.h to a new header
> > file linux/task_sched.h. This way, both sched.h and wait.h can include
> > task_sched.h and fix the circular dependency. No need to include sched.h
> > anymore when wake_up*() macros are used.
> 
> Just include <linux/sched.h> in your driver.
> This include splitting in small pieces is troublesome as well.

so, simply to call wake_up*() we need to know everything there is to
know about the scheduler ? I rather have the split done and kill the
circular dependency. What does Mingo and Peter think about this ?

-- 
balbi
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