X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fia64%2Fkernel%2Fsmp.c;h=99f008853863b61a33e5cb5dc549a1e950e3b688;hb=333b49614bac1801f614128fdcdb6346b383a0df;hp=7f56a498664d7c1e4d448cba6cb4a212904c1b18;hpb=86090fcac5e27b630656fe3d963a6b80e26dac44;p=linux-2.6.git

diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 7f56a4986..99f008853 100644
--- 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);