diff --git a/sys/compat/linuxkpi/common/include/linux/spinlock.h b/sys/compat/linuxkpi/common/include/linux/spinlock.h
--- a/sys/compat/linuxkpi/common/include/linux/spinlock.h
+++ b/sys/compat/linuxkpi/common/include/linux/spinlock.h
@@ -31,6 +31,7 @@
 #ifndef	_LINUX_SPINLOCK_H_
 #define	_LINUX_SPINLOCK_H_
 
+#include <asm/atomic.h>
 #include <sys/param.h>
 #include <sys/kernel.h>
 #include <sys/lock.h>
@@ -160,4 +161,16 @@
 	mtx_assert(&(_l)->m, MA_OWNED);		\
 } while (0)
 
+static inline int
+atomic_dec_and_lock_irqsave(atomic_t *cnt, spinlock_t *lock,
+    unsigned long flags)
+{
+	spin_lock_irqsave(lock, flags);
+	if (atomic_dec_and_test(cnt)) {
+		return (1);
+	}
+	spin_unlock_irqrestore(lock, flags);
+	return (0);
+}
+
 #endif					/* _LINUX_SPINLOCK_H_ */
diff --git a/sys/sys/param.h b/sys/sys/param.h
--- a/sys/sys/param.h
+++ b/sys/sys/param.h
@@ -60,7 +60,7 @@
  *		in the range 5 to 9.
  */
 #undef __FreeBSD_version
-#define __FreeBSD_version 1400010	/* Master, propagated to newvers */
+#define __FreeBSD_version 1400011	/* Master, propagated to newvers */
 
 /*
  * __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,