linux-kernel - Re: [PATCH] kexec: Fix CONFIG

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:	Fri, 2 Feb 2007 20:53:00 +0900
From:	"Magnus Damm" <magnus.damm@...il.com>
To:	"Andrew Morton" <akpm@...ux-foundation.org>
Cc:	"Magnus Damm" <magnus@...inux.co.jp>, linux-kernel@...r.kernel.org,
	linux-ia64@...r.kernel.org, "Luck, Tony" <tony.luck@...el.com>,
	fastboot@...ts.osdl.org, nanhai.zou@...el.com
Subject: Re: [PATCH] kexec: Fix CONFIG_SMP=n compilation (ia64)

On 2/2/07, Magnus Damm <magnus.damm@...il.com> wrote:
> On 2/2/07, Andrew Morton <akpm@...ux-foundation.org> wrote:
> > Magnus Damm <magnus@...inux.co.jp> wrote:
> >
> > > kexec: Fix CONFIG_SMP=n compilation (ia64)
> > >
> > > This patch makes it possible to compile kexec for ia64 without SMP support.
> > > --- 0002/arch/ia64/kernel/machine_kexec.c
> > > +++ work/arch/ia64/kernel/machine_kexec.c     2007-02-01 12:35:46.000000000 +0900
> > > @@ -70,12 +70,14 @@ void machine_kexec_cleanup(struct kimage
> > >
> > >  void machine_shutdown(void)
> > >  {
> > > +#ifdef CONFIG_SMP
> > >       int cpu;
> > >
> > >       for_each_online_cpu(cpu) {
> > >               if (cpu != smp_processor_id())
> > >                       cpu_down(cpu);
> > >       }
> > > +#endif
> > >       kexec_disable_iosapic();
> > >  }
> >
> > hm.  I suspect this one should have been #ifndef CONFIG_HOTPLUG_CPU?

Re-reading this I assume you mean #ifdef CONFIG_HOTPLUG_CPU.

I would be happy to resend a new updated version of the patch, but I
wonder if it may be better to fail miserably during the build than
fail silently in the case of CONFIG_SMP=y but CONFIG_HOTPLUG_CPU=n.

Any ideas?

Nan hai, is there any particular reason why the ia64 kexec code builds
on top of cpu hotplug instead of smp functions such as
smp_send_stop()?

Thanks!

/ magnus
-
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/