1 files changed, 37 insertions, 0 deletions

diff --git a/include/asm-x86_64/hardirq.h b/include/asm-x86_64/hardirq.h
new file mode 100644
index 000000000000..27c381fa1c9d
--- /dev/null
+++ b/include/asm-x86_64/hardirq.h
@@ -0,0 +1,37 @@
+#ifndef __ASM_HARDIRQ_H
+#define __ASM_HARDIRQ_H
+
+#include <linux/config.h>
+#include <linux/threads.h>
+#include <linux/irq.h>
+#include <asm/pda.h>
+#include <asm/apic.h>
+
+#define __ARCH_IRQ_STAT 1
+
+/* Generate a lvalue for a pda member. Should fix softirq.c instead to use
+   special access macros. This would generate better code. */ 
+#define __IRQ_STAT(cpu,member) (read_pda(me)->member)
+
+#include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
+
+/*
+ * 'what should we do if we get a hw irq event on an illegal vector'.
+ * each architecture has to answer this themselves.
+ */
+static inline void ack_bad_irq(unsigned int irq)
+{
+        printk("unexpected IRQ trap at vector %02x\n", irq);
+#ifdef CONFIG_X86_LOCAL_APIC
+        /*
+         * Currently unexpected vectors happen only on SMP and APIC.
+         * We _must_ ack these because every local APIC has only N
+         * irq slots per priority level, and a 'hanging, unacked' IRQ
+         * holds up an irq slot - in excessive cases (when multiple
+         * unexpected vectors occur) that might lock up the APIC
+         * completely.
+         */
+        ack_APIC_irq();
+#endif
+}
+#endif /* __ASM_HARDIRQ_H */