1 files changed, 29 insertions, 0 deletions

diff --git a/arch/x86/kernel/cpu/mcheck/threshold.c b/arch/x86/kernel/cpu/mcheck/threshold.c
new file mode 100644
index 00000000000..23ee9e730f7
--- /dev/null
+++ b/arch/x86/kernel/cpu/mcheck/threshold.c
@@ -0,0 +1,29 @@
+/*
+ * Common corrected MCE threshold handler code:
+ */
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+
+#include <asm/irq_vectors.h>
+#include <asm/apic.h>
+#include <asm/idle.h>
+#include <asm/mce.h>
+
+static void default_threshold_interrupt(void)
+{
+        printk(KERN_ERR "Unexpected threshold interrupt at vector %x\n",
+                         THRESHOLD_APIC_VECTOR);
+}
+
+void (*mce_threshold_vector)(void) = default_threshold_interrupt;
+
+asmlinkage void mce_threshold_interrupt(void)
+{
+        exit_idle();
+        irq_enter();
+        inc_irq_stat(irq_threshold_count);
+        mce_threshold_vector();
+        irq_exit();
+        /* Ack only at the end to avoid potential reentry */
+        ack_APIC_irq();
+}