kexec: Fix CONFIG_SMP=n compilation (ia64)
This patch makes it possible to compile kexec for ia64 without SMP support.
Signed-off-by: Magnus Damm <[email protected]>
---
Applies on top of 2.6.20-rc7.
arch/ia64/kernel/crash.c | 11 +++++++----
arch/ia64/kernel/machine_kexec.c | 2 ++
2 files changed, 9 insertions(+), 4 deletions(-)
--- 0002/arch/ia64/kernel/crash.c
+++ work/arch/ia64/kernel/crash.c 2007-02-01 12:42:38.000000000 +0900
@@ -79,6 +79,7 @@ crash_save_this_cpu()
final_note(buf);
}
+#ifdef CONFIG_SMP
static int
kdump_wait_cpu_freeze(void)
{
@@ -91,6 +92,7 @@ kdump_wait_cpu_freeze(void)
}
return 1;
}
+#endif
void
machine_crash_shutdown(struct pt_regs *pt)
@@ -132,11 +134,12 @@ kdump_cpu_freeze(struct unw_frame_info *
atomic_inc(&kdump_cpu_freezed);
kdump_status[cpuid] = 1;
mb();
- if (cpuid == 0) {
- for (;;)
- cpu_relax();
- } else
+#ifdef CONFIG_HOTPLUG_CPU
+ if (cpuid != 0)
ia64_jump_to_sal(&sal_boot_rendez_state[cpuid]);
+#endif
+ for (;;)
+ cpu_relax();
}
static int
--- 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();
}
(added ia64 list)
(added ia64 maintainer)
(added kexec list)
On Thu, 01 Feb 2007 22:13:47 +0900
Magnus Damm <[email protected]> wrote:
> kexec: Fix CONFIG_SMP=n compilation (ia64)
>
> This patch makes it possible to compile kexec for ia64 without SMP support.
>
Please always include the compiler stderr when fixing build errors or
warnings.
>
> Applies on top of 2.6.20-rc7.
>
> arch/ia64/kernel/crash.c | 11 +++++++----
> arch/ia64/kernel/machine_kexec.c | 2 ++
> 2 files changed, 9 insertions(+), 4 deletions(-)
>
> --- 0002/arch/ia64/kernel/crash.c
> +++ work/arch/ia64/kernel/crash.c 2007-02-01 12:42:38.000000000 +0900
> @@ -79,6 +79,7 @@ crash_save_this_cpu()
> final_note(buf);
> }
>
> +#ifdef CONFIG_SMP
> static int
> kdump_wait_cpu_freeze(void)
> {
> @@ -91,6 +92,7 @@ kdump_wait_cpu_freeze(void)
> }
> return 1;
> }
> +#endif
I think this is a warning fix?
> void
> machine_crash_shutdown(struct pt_regs *pt)
> @@ -132,11 +134,12 @@ kdump_cpu_freeze(struct unw_frame_info *
> atomic_inc(&kdump_cpu_freezed);
> kdump_status[cpuid] = 1;
> mb();
> - if (cpuid == 0) {
> - for (;;)
> - cpu_relax();
> - } else
> +#ifdef CONFIG_HOTPLUG_CPU
> + if (cpuid != 0)
> ia64_jump_to_sal(&sal_boot_rendez_state[cpuid]);
> +#endif
> + for (;;)
> + cpu_relax();
> }
I trust ia64_jump_to_sal doesn't return.
> static int
> --- 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?
I was wondering if we should have stubs for cpu_down() if !CONFIG_HOTPLUG_CPU,
but perhaps that doesn't make sense.
On 2/2/07, Andrew Morton <[email protected]> wrote:
>
> (added ia64 list)
> (added ia64 maintainer)
> (added kexec list)
Sorry about that.
> On Thu, 01 Feb 2007 22:13:47 +0900
> Magnus Damm <[email protected]> wrote:
>
> > kexec: Fix CONFIG_SMP=n compilation (ia64)
> >
> > This patch makes it possible to compile kexec for ia64 without SMP support.
> >
>
> Please always include the compiler stderr when fixing build errors or
> warnings.
Ok, will do. With CONFIG_SMP=n and CONFIG_HOTPLUG_CPU=n:
CC arch/ia64/kernel/machine_kexec.o
arch/ia64/kernel/machine_kexec.c: In function `machine_shutdown':
arch/ia64/kernel/machine_kexec.c:77: warning: implicit declaration of
function `cpu_down'
AS arch/ia64/kernel/relocate_kernel.o
CC arch/ia64/kernel/crash.o
arch/ia64/kernel/crash.c: In function `kdump_cpu_freeze':
arch/ia64/kernel/crash.c:139: warning: implicit declaration of
function `ia64_jump_to_sal'
arch/ia64/kernel/crash.c:139: error: `sal_boot_rendez_state'
undeclared (first use in this function)
arch/ia64/kernel/crash.c:139: error: (Each undeclared identifier is
reported only once
arch/ia64/kernel/crash.c:139: error: for each function it appears in.)
arch/ia64/kernel/crash.c: At top level:
arch/ia64/kernel/crash.c:84: warning: 'kdump_wait_cpu_freeze' defined
but not used
make[1]: *** [arch/ia64/kernel/crash.o] Error 1
make: *** [arch/ia64/kernel] Error 2
damm@localhost ~/build/kernel/linux-2.6.20-rc7 $
> > --- 0002/arch/ia64/kernel/crash.c
> > +++ work/arch/ia64/kernel/crash.c 2007-02-01 12:42:38.000000000 +0900
> > @@ -79,6 +79,7 @@ crash_save_this_cpu()
> > final_note(buf);
> > }
> >
> > +#ifdef CONFIG_SMP
> > static int
> > kdump_wait_cpu_freeze(void)
> > {
> > @@ -91,6 +92,7 @@ kdump_wait_cpu_freeze(void)
> > }
> > return 1;
> > }
> > +#endif
>
> I think this is a warning fix?
Yes. The file already has some CONFIG_SMP #ifdeffery in it but not
enough to compile properly.
> > void
> > machine_crash_shutdown(struct pt_regs *pt)
> > @@ -132,11 +134,12 @@ kdump_cpu_freeze(struct unw_frame_info *
> > atomic_inc(&kdump_cpu_freezed);
> > kdump_status[cpuid] = 1;
> > mb();
> > - if (cpuid == 0) {
> > - for (;;)
> > - cpu_relax();
> > - } else
> > +#ifdef CONFIG_HOTPLUG_CPU
> > + if (cpuid != 0)
> > ia64_jump_to_sal(&sal_boot_rendez_state[cpuid]);
> > +#endif
> > + for (;;)
> > + cpu_relax();
> > }
>
> I trust ia64_jump_to_sal doesn't return.
So do I. The main problem with the compilation seems to be that
ia64_jump_to_sal() only exists if CONFIG_HOTPLUG_CPU=y.
(include/asm-ia64/sal.h, arch/ia64/kernel/head.S)
> > static int
> > --- 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?
Yes, you are right.
Maybe we can replace the entire code block above with smp_send_stop()
later on? That would make the code more similar to the i386 and x86_64
code.
> I was wondering if we should have stubs for cpu_down() if !CONFIG_HOTPLUG_CPU,
> but perhaps that doesn't make sense.
cpu_down() is only used in a few places so I don't think it's worth it.
I wonder why cpu_down() isn't marked as __cpuexit. Maybe because it is
already wrapped in CONFIG_HOTPLUG_CPU.
Thanks!
/ magnus
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Magnus Damm
> Sent: 2007??2??2?? 10:39
> To: Andrew Morton
> Cc: Magnus Damm; [email protected]; [email protected];
> Luck, Tony; [email protected]
> Subject: Re: [PATCH] kexec: Fix CONFIG_SMP=n compilation (ia64)
>
> On 2/2/07, Andrew Morton <[email protected]> wrote:
> >
> > (added ia64 list)
> > (added ia64 maintainer)
> > (added kexec list)
>
> Sorry about that.
>
> > On Thu, 01 Feb 2007 22:13:47 +0900
> > Magnus Damm <[email protected]> wrote:
> >
> > > kexec: Fix CONFIG_SMP=n compilation (ia64)
> > >
> > > This patch makes it possible to compile kexec for ia64 without SMP support.
> > >
> >
> > Please always include the compiler stderr when fixing build errors or
> > warnings.
>
> Ok, will do. With CONFIG_SMP=n and CONFIG_HOTPLUG_CPU=n:
>
> CC arch/ia64/kernel/machine_kexec.o
> arch/ia64/kernel/machine_kexec.c: In function `machine_shutdown':
> arch/ia64/kernel/machine_kexec.c:77: warning: implicit declaration of
> function `cpu_down'
> AS arch/ia64/kernel/relocate_kernel.o
> CC arch/ia64/kernel/crash.o
> arch/ia64/kernel/crash.c: In function `kdump_cpu_freeze':
> arch/ia64/kernel/crash.c:139: warning: implicit declaration of
> function `ia64_jump_to_sal'
> arch/ia64/kernel/crash.c:139: error: `sal_boot_rendez_state'
> undeclared (first use in this function)
> arch/ia64/kernel/crash.c:139: error: (Each undeclared identifier is
> reported only once
> arch/ia64/kernel/crash.c:139: error: for each function it appears in.)
> arch/ia64/kernel/crash.c: At top level:
> arch/ia64/kernel/crash.c:84: warning: 'kdump_wait_cpu_freeze' defined
> but not used
> make[1]: *** [arch/ia64/kernel/crash.o] Error 1
> make: *** [arch/ia64/kernel] Error 2
> damm@localhost ~/build/kernel/linux-2.6.20-rc7 $
>
> > > --- 0002/arch/ia64/kernel/crash.c
> > > +++ work/arch/ia64/kernel/crash.c 2007-02-01 12:42:38.000000000
> +0900
> > > @@ -79,6 +79,7 @@ crash_save_this_cpu()
> > > final_note(buf);
> > > }
> > >
> > > +#ifdef CONFIG_SMP
> > > static int
> > > kdump_wait_cpu_freeze(void)
> > > {
> > > @@ -91,6 +92,7 @@ kdump_wait_cpu_freeze(void)
> > > }
> > > return 1;
> > > }
> > > +#endif
> >
> > I think this is a warning fix?
>
> Yes. The file already has some CONFIG_SMP #ifdeffery in it but not
> enough to compile properly.
>
> > > void
> > > machine_crash_shutdown(struct pt_regs *pt)
> > > @@ -132,11 +134,12 @@ kdump_cpu_freeze(struct unw_frame_info *
> > > atomic_inc(&kdump_cpu_freezed);
> > > kdump_status[cpuid] = 1;
> > > mb();
> > > - if (cpuid == 0) {
> > > - for (;;)
> > > - cpu_relax();
> > > - } else
> > > +#ifdef CONFIG_HOTPLUG_CPU
> > > + if (cpuid != 0)
> > > ia64_jump_to_sal(&sal_boot_rendez_state[cpuid]);
> > > +#endif
> > > + for (;;)
> > > + cpu_relax();
> > > }
> >
> > I trust ia64_jump_to_sal doesn't return.
>
> So do I. The main problem with the compilation seems to be that
> ia64_jump_to_sal() only exists if CONFIG_HOTPLUG_CPU=y.
> (include/asm-ia64/sal.h, arch/ia64/kernel/head.S)
>
This may cause problem on SN platform.
I remember SN requires cpu0 return to SAL rendez loop to do IRQ redirection.
However this needs SGI people to confirm...
Thanks
Zou Nan hai
>
> Thanks!
>
> / magnus
> -
> To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Feb 02, 2007 at 11:01:21AM +0800, Zou, Nanhai wrote:
> > > > void
> > > > machine_crash_shutdown(struct pt_regs *pt)
> > > > @@ -132,11 +134,12 @@ kdump_cpu_freeze(struct unw_frame_info *
> > > > atomic_inc(&kdump_cpu_freezed);
> > > > kdump_status[cpuid] = 1;
> > > > mb();
> > > > - if (cpuid == 0) {
> > > > - for (;;)
> > > > - cpu_relax();
> > > > - } else
> > > > +#ifdef CONFIG_HOTPLUG_CPU
> > > > + if (cpuid != 0)
> > > > ia64_jump_to_sal(&sal_boot_rendez_state[cpuid]);
> > > > +#endif
> > > > + for (;;)
> > > > + cpu_relax();
> > > > }
> > >
> > > I trust ia64_jump_to_sal doesn't return.
> >
> > So do I. The main problem with the compilation seems to be that
> > ia64_jump_to_sal() only exists if CONFIG_HOTPLUG_CPU=y.
> > (include/asm-ia64/sal.h, arch/ia64/kernel/head.S)
> >
> This may cause problem on SN platform.
> I remember SN requires cpu0 return to SAL rendez loop to do IRQ redirection.
> However this needs SGI people to confirm...
Does this mean that CONFIG_HOTPLUG_CPU may be required for kdump
on the SN platform?
--
Horms
H: http://www.vergenet.net/~horms/
W: http://www.valinux.co.jp/en/
On 2/2/07, Magnus Damm <[email protected]> wrote:
> On 2/2/07, Andrew Morton <[email protected]> wrote:
> > Magnus Damm <[email protected]> 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
Horms wrote:
> On Fri, Feb 02, 2007 at 11:01:21AM +0800, Zou, Nanhai wrote:
>>>>> void
>>>>> machine_crash_shutdown(struct pt_regs *pt)
>>>>> @@ -132,11 +134,12 @@ kdump_cpu_freeze(struct unw_frame_info *
>>>>> atomic_inc(&kdump_cpu_freezed);
>>>>> kdump_status[cpuid] = 1;
>>>>> mb();
>>>>> - if (cpuid == 0) {
>>>>> - for (;;)
>>>>> - cpu_relax();
>>>>> - } else
>>>>> +#ifdef CONFIG_HOTPLUG_CPU
>>>>> + if (cpuid != 0)
>>>>> ia64_jump_to_sal(&sal_boot_rendez_state[cpuid]);
>>>>> +#endif
>>>>> + for (;;)
>>>>> + cpu_relax();
>>>>> }
>>>> I trust ia64_jump_to_sal doesn't return.
>>> So do I. The main problem with the compilation seems to be that
>>> ia64_jump_to_sal() only exists if CONFIG_HOTPLUG_CPU=y.
>>> (include/asm-ia64/sal.h, arch/ia64/kernel/head.S)
>>>
>> This may cause problem on SN platform.
>> I remember SN requires cpu0 return to SAL rendez loop to do IRQ redirection.
>> However this needs SGI people to confirm...
SN needs slave cpus being returned to SAL rendez loop with the exception
of cpu0. It seems there is not a decent way to return cpu0, so we
decided to handle cpu0 in PROM. This above code change does not casue
problem on SN platform.
>
> Does this mean that CONFIG_HOTPLUG_CPU may be required for kdump
> on the SN platform?
The SN platform uses the ia64_jump_to_sal() routine.
Thanks,
- jay
On Fri, Feb 02, 2007 at 08:53:00PM +0900, Magnus Damm wrote:
> On 2/2/07, Magnus Damm <[email protected]> wrote:
> > On 2/2/07, Andrew Morton <[email protected]> wrote:
> > > Magnus Damm <[email protected]> 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.
--
Horms
H: http://www.vergenet.net/~horms/
W: http://www.valinux.co.jp/en/
> -----Original Message-----
> From: Horms [mailto:[email protected]]
> Sent: 2007??2??3?? 11:28
> To: Magnus Damm
> Cc: Andrew Morton; Magnus Damm; Luck, Tony; [email protected]; Zou,
> Nanhai; [email protected]; [email protected]
> Subject: Re: [Fastboot] [PATCH] kexec: Fix CONFIG_SMP=n compilation (ia64)
>
> On Fri, Feb 02, 2007 at 08:53:00PM +0900, Magnus Damm wrote:
> > On 2/2/07, Magnus Damm <[email protected]> wrote:
> > > On 2/2/07, Andrew Morton <[email protected]> wrote:
> > > > Magnus Damm <[email protected]> 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.
>
Yes, CONFIG_HOTPLUG_CPU is required by Kexec.
But CONFIG_HOTPLUG_CPU is not required by Kdump except SN platform.
Zou Nan hai
> --
> Horms
> H: http://www.vergenet.net/~horms/
> W: http://www.valinux.co.jp/en/
On 2/3/07, Horms <[email protected]> wrote:
> On Fri, Feb 02, 2007 at 08:53:00PM +0900, Magnus Damm wrote:
> > On 2/2/07, Magnus Damm <[email protected]> wrote:
> > > On 2/2/07, Andrew Morton <[email protected]> wrote:
> > > > Magnus Damm <[email protected]> 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