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Subject[patch 081/101] kexec: Fix CONFIG_SMP=n compilation V2 (ia64)

From: Magnus Damm <magnus@valinux.co.jp>

Kexec support for 2.6.20 on ia64 does not build properly using a config
made up by 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

Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Acked-by: Simon Horman <horms@verge.net.au>
Acked-by: Jay Lan <jlan@sgi.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
arch/ia64/kernel/crash.c | 11 +++++++----
arch/ia64/kernel/machine_kexec.c | 2 ++
2 files changed, 9 insertions(+), 4 deletions(-)
--- linux-2.6.20.1.orig/arch/ia64/kernel/crash.c
+++ linux-2.6.20.1/arch/ia64/kernel/crash.c
@@ -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
--- linux-2.6.20.1.orig/arch/ia64/kernel/machine_kexec.c
+++ linux-2.6.20.1/arch/ia64/kernel/machine_kexec.c
@@ -70,12 +70,14 @@ void machine_kexec_cleanup(struct kimage

void machine_shutdown(void)
{
+#ifdef CONFIG_HOTPLUG_CPU
int cpu;

for_each_online_cpu(cpu) {
if (cpu != smp_processor_id())
cpu_down(cpu);
}
+#endif
kexec_disable_iosapic();
}

--
-
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