Messages in this thread | | | Date | Fri, 10 Feb 2006 13:21:04 +0100 | From | Pavel Machek <> | Subject | Re: [PATCH, RFC] [1/3] Generic in-kernel AC status |
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On St 08-02-06 23:25:32, Philipp Matthias Hahn wrote: > Hi! > > On Wed, Feb 08, 2006 at 01:04:22PM +0000, Matthew Garrett wrote: > > diff --git a/include/linux/pm.h b/include/linux/pm.h > ... > > +void pm_set_ac_status(int (*ac_status_function)(void)) > > +{ > > + down(&pm_sem); > > + get_ac_status = ac_status_function; > > + up(&pm_sem); > > +} > > Why do you need a semaphore/mutex, when you only do one assignment, > which is atomic by itself?
It is not. Pavel
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