linux-kernel - Re: [PATCH -mm 2/2] Introduce freezer flags

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Message-Id: <200704272349.36736.rjw@sisk.pl>
Date:	Fri, 27 Apr 2007 23:49:35 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	ego@...ibm.com
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, Oleg Nesterov <oleg@...sign.ru>,
	Pavel Machek <pavel@....cz>,
	Pekka Enberg <penberg@...helsinki.fi>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -mm 2/2] Introduce freezer flags

On Friday, 27 April 2007 23:40, Gautham R Shenoy wrote:
> On Fri, Apr 27, 2007 at 05:40:16PM +0200, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rjw@...k.pl>
> > 
> > Move all of the freezer-related flags to a separate field in task_struct and
> > introduce functions to operate them using set_bit() etc.
> > 
> > 
> > Index: linux-2.6.21-rc7-mm2/include/linux/sched.h
> > ===================================================================
> > --- linux-2.6.21-rc7-mm2.orig/include/linux/sched.h
> > +++ linux-2.6.21-rc7-mm2/include/linux/sched.h
> > @@ -1006,7 +1006,10 @@ struct task_struct {
> >  	/* Deadlock detection and priority inheritance handling */
> >  	struct rt_mutex_waiter *pi_blocked_on;
> >  #endif
> > -
> > +#ifdef CONFIG_FREEZER
> > +	/* Used by the process freezer, defined in freezer.h */
> > +	unsigned int freezer_flags;
> 
> unsigned long freezer_flags; ??

I guess so.

> Else it throws the following warnings.

On which arch is that?  I've tested on x86_64 ...

> include/linux/freezer.h: In function `frozen':
> include/linux/freezer.h:22: warning: passing arg 2 of
> `constant_test_bit' from incompatible pointer type
> include/linux/freezer.h:22: warning: passing arg 2 of
> `variable_test_bit' from incompatible pointer type
> include/linux/freezer.h: In function `set_frozen_flag':
> include/linux/freezer.h:27: warning: passing arg 2 of `set_bit' from
> incompatible pointer type
> include/linux/freezer.h: In function `clear_frozen_flag':
> include/linux/freezer.h:32: warning: passing arg 2 of `clear_bit' from
> incompatible pointer type
> include/linux/freezer.h: In function `freezing':
> include/linux/freezer.h:40: warning: passing arg 2 of
> `constant_test_bit' from incompatible pointer type
> include/linux/freezer.h:40: warning: passing arg 2 of
> `variable_test_bit' from incompatible pointer type
> include/linux/freezer.h: In function `freeze':
> include/linux/freezer.h:48: warning: passing arg 2 of `set_bit' from
> incompatible pointer type
> include/linux/freezer.h: In function `clear_freeze_flag':
> include/linux/freezer.h:56: warning: passing arg 2 of `clear_bit' from
> incompatible pointer type
> include/linux/freezer.h: In function `freezer_should_exempt':
> include/linux/freezer.h:64: warning: passing arg 2 of
> `constant_test_bit' from incompatible pointer type
> include/linux/freezer.h:64: warning: passing arg 2 of
> `variable_test_bit' from incompatible pointer type
> include/linux/freezer.h: In function `freezer_exempt':
> include/linux/freezer.h:72: warning: passing arg 2 of `set_bit' from
> incompatible pointer type
> include/linux/freezer.h: In function `freezer_do_not_count':
> include/linux/freezer.h:132: warning: passing arg 2 of `set_bit' from
> incompatible pointer type
> include/linux/freezer.h: In function `freezer_count':
> include/linux/freezer.h:142: warning: passing arg 2 of `clear_bit' from
> incompatible pointer type
> include/linux/freezer.h: In function `freezer_should_skip':
> include/linux/freezer.h:152: warning: passing arg 2 of
> `constant_test_bit' from incompatible pointer type
> include/linux/freezer.h:152: warning: passing arg 2 of
> `variable_test_bit' from incompatible pointer type

Greetings,
Rafael
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