diff --git a/libc/kernel/common/linux/hardirq.h b/libc/kernel/common/linux/hardirq.h
new file mode 100644
index 0000000..c0566b0
--- /dev/null
+++ b/libc/kernel/common/linux/hardirq.h
@@ -0,0 +1,73 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef LINUX_HARDIRQ_H
+#define LINUX_HARDIRQ_H
+
+#include <linux/preempt.h>
+#include <linux/smp_lock.h>
+#include <linux/lockdep.h>
+#include <asm/hardirq.h>
+#include <asm/system.h>
+
+#define PREEMPT_BITS 8
+#define SOFTIRQ_BITS 8
+
+#ifndef HARDIRQ_BITS
+#define HARDIRQ_BITS 12
+
+#if 1 << HARDIRQ_BITS < NR_IRQS
+#error HARDIRQ_BITS is too low!
+#endif
+#endif
+
+#define PREEMPT_SHIFT 0
+#define SOFTIRQ_SHIFT (PREEMPT_SHIFT + PREEMPT_BITS)
+#define HARDIRQ_SHIFT (SOFTIRQ_SHIFT + SOFTIRQ_BITS)
+
+#define __IRQ_MASK(x) ((1UL << (x))-1)
+
+#define PREEMPT_MASK (__IRQ_MASK(PREEMPT_BITS) << PREEMPT_SHIFT)
+#define SOFTIRQ_MASK (__IRQ_MASK(SOFTIRQ_BITS) << SOFTIRQ_SHIFT)
+#define HARDIRQ_MASK (__IRQ_MASK(HARDIRQ_BITS) << HARDIRQ_SHIFT)
+
+#define PREEMPT_OFFSET (1UL << PREEMPT_SHIFT)
+#define SOFTIRQ_OFFSET (1UL << SOFTIRQ_SHIFT)
+#define HARDIRQ_OFFSET (1UL << HARDIRQ_SHIFT)
+
+#if PREEMPT_ACTIVE < 1 << HARDIRQ_SHIFT + HARDIRQ_BITS
+#error PREEMPT_ACTIVE is too low!
+#endif
+
+#define hardirq_count() (preempt_count() & HARDIRQ_MASK)
+#define softirq_count() (preempt_count() & SOFTIRQ_MASK)
+#define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK))
+
+#define in_irq() (hardirq_count())
+#define in_softirq() (softirq_count())
+#define in_interrupt() (irq_count())
+
+#define in_atomic() ((preempt_count() & ~PREEMPT_ACTIVE) != 0)
+
+#define preemptible() 0
+#define IRQ_EXIT_OFFSET HARDIRQ_OFFSET
+
+#define synchronize_irq(irq) barrier()
+
+struct task_struct;
+
+#define irq_enter()   do {   account_system_vtime(current);   add_preempt_count(HARDIRQ_OFFSET);   trace_hardirq_enter();   } while (0)
+#define __irq_exit()   do {   trace_hardirq_exit();   account_system_vtime(current);   sub_preempt_count(HARDIRQ_OFFSET);   } while (0)
+
+#define nmi_enter() do { lockdep_off(); irq_enter(); } while (0)
+#define nmi_exit() do { __irq_exit(); lockdep_on(); } while (0)
+
+#endif