patch-2_6_7-vs1_9_1_12

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

diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 7f56a49..99f0088 100644 (file)
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -28,7 +28,6 @@
 #include <linux/mm.h>
 #include <linux/cache.h>
 #include <linux/delay.h>
-#include <linux/cache.h>
 #include <linux/efi.h>
 
 #include <asm/atomic.h>
@@ -71,10 +70,23 @@ static volatile struct call_data_struct *call_data;
 /* This needs to be cacheline aligned because it is written to by *other* CPUs.  */
 static DEFINE_PER_CPU(u64, ipi_operation) ____cacheline_aligned;
 
+extern void cpu_halt (void);
+
+void
+lock_ipi_calllock(void)
+{
+       spin_lock_irq(&call_lock);
+}
+
+void
+unlock_ipi_calllock(void)
+{
+       spin_unlock_irq(&call_lock);
+}
+
 static void
 stop_this_cpu (void)
 {
-       extern void cpu_halt (void);
        /*
         * Remove this CPU:
         */
@@ -84,6 +96,17 @@ stop_this_cpu (void)
        cpu_halt();
 }
 
+void
+cpu_die(void)
+{
+       max_xtp();
+       local_irq_disable();
+       cpu_halt();
+       /* Should never be here */
+       BUG();
+       for (;;);
+}
+
 irqreturn_t
 handle_IPI (int irq, void *dev_id, struct pt_regs *regs)
 {
@@ -308,6 +331,9 @@ smp_call_function (void (*func) (void *info), void *info, int nonatomic, int wai
        if (!cpus)
                return 0;
 
+       /* Can deadlock when called with interrupts disabled */
+       WARN_ON(irqs_disabled());
+
        data.func = func;
        data.info = info;
        atomic_set(&data.started, 0);