On 2/3/07, Horms <horms@xxxxxxxxxxxx> wrote:
On Fri, Feb 02, 2007 at 08:53:00PM +0900, Magnus Damm wrote: > On 2/2/07, Magnus Damm <magnus.damm@xxxxxxxxx> wrote: > > On 2/2/07, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > > Magnus Damm <magnus@xxxxxxxxxxxxx> 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. There used to be alternate code for the CONFIG_SMP + !CONFIG_HOTPLUG_CPU, but this was removed because it was determined to be flakey and not maintainable (I can dig up the threads if you want). I think that this means that if we have CONFIG_KEXEC and CONFIG_SMP then CONFIG_HOTPLUG_CPU is required. I think this is expressable in Kconfig somehow.
My mistake, the following lines from linux-2.6.20/arch/ia64/Kconfig seem to handle this case already: config KEXEC bool "kexec system call (EXPERIMENTAL)" depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU) I'll send an updated patch in a short while. Thanks! / magnus - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
![]() |