Pull button into test branch

[sfrench/cifs-2.6.git] / arch / ia64 / kernel / smp.c

diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 6ab95ceaf9d4f34aa32a382a9e32cb68bb98b23b..f4c7f7769cf7df617bdb7cecefd5be4802bb840e 100644 (file)
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -30,6 +30,7 @@
 #include <linux/delay.h>
 #include <linux/efi.h>
 #include <linux/bitops.h>
+#include <linux/kexec.h>
 
 #include <asm/atomic.h>
 #include <asm/current.h>
@@ -66,6 +67,7 @@ static volatile struct call_data_struct *call_data;
 
 #define IPI_CALL_FUNC          0
 #define IPI_CPU_STOP           1
+#define IPI_KDUMP_CPU_STOP     3
 
 /* This needs to be cacheline aligned because it is written to by *other* CPUs.  */
 static DEFINE_PER_CPU(u64, ipi_operation) ____cacheline_aligned;
@@ -155,7 +157,11 @@ handle_IPI (int irq, void *dev_id)
                              case IPI_CPU_STOP:
                                stop_this_cpu();
                                break;
-
+#ifdef CONFIG_KEXEC
+                             case IPI_KDUMP_CPU_STOP:
+                               unw_init_running(kdump_cpu_freeze, NULL);
+                               break;
+#endif
                              default:
                                printk(KERN_CRIT "Unknown IPI on CPU %d: %lu\n", this_cpu, which);
                                break;
@@ -213,6 +219,26 @@ send_IPI_self (int op)
        send_IPI_single(smp_processor_id(), op);
 }
 
+#ifdef CONFIG_KEXEC
+void
+kdump_smp_send_stop()
+{
+       send_IPI_allbutself(IPI_KDUMP_CPU_STOP);
+}
+
+void
+kdump_smp_send_init()
+{
+       unsigned int cpu, self_cpu;
+       self_cpu = smp_processor_id();
+       for_each_online_cpu(cpu) {
+               if (cpu != self_cpu) {
+                       if(kdump_status[cpu] == 0)
+                               platform_send_ipi(cpu, 0, IA64_IPI_DM_INIT, 0);
+               }
+       }
+}
+#endif
 /*
  * Called with preeemption disabled.
  */