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Subject[PATCH 4/8] x86 kdump: Make kdump_nmi_callback() a function ptr on crash_nmi_callback()
Date
The reboot code will use a different function on crash_nmi_callback().
Adding a function pointer parameter to nmi_shootdown_cpus() for that.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
arch/x86/kernel/crash.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 75c468c..f23c2be 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -29,10 +29,13 @@

#include <mach_ipi.h>

+typedef void (*nmi_shootdown_cb)(int, struct die_args*);
+
#if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)

/* This keeps a track of which one is crashing cpu. */
static int crashing_cpu;
+static nmi_shootdown_cb shootdown_callback;

static atomic_t waiting_for_crash_ipi;

@@ -74,7 +77,7 @@ static int crash_nmi_callback(struct notifier_block *self,
return NOTIFY_STOP;
local_irq_disable();

- kdump_nmi_callback(cpu, (struct die_args *)data);
+ shootdown_callback(cpu, (struct die_args *)data);

atomic_dec(&waiting_for_crash_ipi);
/* Assume hlt works */
@@ -97,13 +100,15 @@ static struct notifier_block crash_nmi_nb = {
.notifier_call = crash_nmi_callback,
};

-static void nmi_shootdown_cpus(void)
+static void nmi_shootdown_cpus(nmi_shootdown_cb callback)
{
unsigned long msecs;

/* Make a note of crashing cpu. Will be used in NMI callback.*/
crashing_cpu = safe_smp_processor_id();

+ shootdown_callback = callback;
+
atomic_set(&waiting_for_crash_ipi, num_online_cpus() - 1);
/* Would it be better to replace the trap vector here? */
if (register_die_notifier(&crash_nmi_nb))
@@ -126,7 +131,7 @@ static void nmi_shootdown_cpus(void)

static void kdump_nmi_shootdown_cpus(void)
{
- nmi_shootdown_cpus();
+ nmi_shootdown_cpus(kdump_nmi_callback);

disable_local_APIC();
}
--
1.5.5.GIT


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