Re: [patch] i386: halt the CPU on serious errors
From: Chuck Ebbert
Date: Wed Jun 21 2006 - 05:21:10 EST
In-Reply-To: <20060620050910.GA6091@xxxxxxxxxx>
On Tue, 20 Jun 2006 01:09:10 -0400, Dave Jones wrote:
> > --- 2.6.17-32.orig/arch/i386/kernel/crash.c
> > +++ 2.6.17-32/arch/i386/kernel/crash.c
> > @@ -113,8 +113,8 @@ static int crash_nmi_callback(struct pt_
> > disable_local_APIC();
> > atomic_dec(&waiting_for_crash_ipi);
> > /* Assume hlt works */
> > - halt();
> > - for(;;);
> > + for (;;)
> > + halt();
> >
> > return 1;
>
> But we should never get past that first halt(), as interrupts are disabled.
Yeah, but why not do it anyway? I'll change the comment.
> > --- 2.6.17-32.orig/arch/i386/kernel/doublefault.c
> > +++ 2.6.17-32/arch/i386/kernel/doublefault.c
> > @@ -44,7 +44,8 @@ static void doublefault_fn(void)
> > }
> > }
> >
> > - for (;;) /* nothing */;
> > + for (;;)
> > + halt();
> > }
>
> This one would probably be better off as a cpu_relax()
OK.
--
Chuck
"You can't read a newspaper if you can't read." --George W. Bush
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