linux-kernel - Re: [PATCH 1/1] cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 23 Jun 2015 20:13:10 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	KY Srinivasan <kys@...rosoft.com>
Cc:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"mingo@...nel.org" <mingo@...nel.org>,
	"rafael.j.wysocki@...el.com" <rafael.j.wysocki@...el.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	Vitaly Kuznetsov <vkuznets@...hat.com>
Subject: Re: [PATCH  1/1] cpu-hotplug: export
 cpu_hotplug_enable/cpu_hotplug_disable

On Tue, Jun 23, 2015 at 04:57:05PM +0000, KY Srinivasan wrote:

> > diff --git a/kernel/cpu.c b/kernel/cpu.c
> > index 94bbe46..8f35ee6 100644
> > --- a/kernel/cpu.c
> > +++ b/kernel/cpu.c
> > @@ -190,17 +190,19 @@ void cpu_hotplug_done(void)
> >  void cpu_hotplug_disable(void)
> >  {
> >  	cpu_maps_update_begin();
> > -	cpu_hotplug_disabled = 1;
> > +	cpu_hotplug_disabled++;
> >  	cpu_maps_update_done();
> >  }
> > +EXPORT_SYMBOL_GPL(cpu_hotplug_disable);
> > 
> >  void cpu_hotplug_enable(void)
> >  {
> >  	cpu_maps_update_begin();
> > -	cpu_hotplug_disabled = 0;
> > +	if (cpu_hotplug_disabled)
> > +		cpu_hotplug_disabled--;

No that just papers over bugs.

> >  	cpu_maps_update_done();
> >  }
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/