From 1a9e2f75a7848f318007acaac78c5571e3e83033 Mon Sep 17 00:00:00 2001
From: jhb <jhb@FreeBSD.org>
Date: Tue, 21 May 2002 20:21:53 +0000
Subject: [PATCH] Add an inline function cpu_pause() for the IA32 'pause'
 instruction.

---
 sys/amd64/include/cpufunc.h | 6 ++++++
 sys/i386/include/cpufunc.h  | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/sys/amd64/include/cpufunc.h b/sys/amd64/include/cpufunc.h
index a77fda1fb5a3..e0b7c996071d 100644
--- a/sys/amd64/include/cpufunc.h
+++ b/sys/amd64/include/cpufunc.h
@@ -560,6 +560,12 @@ load_dr7(u_int sel)
 	__asm __volatile("movl %0,%%dr7" : : "r" (sel));
 }
 
+static __inline void
+cpu_pause(void)
+{
+	__asm __volatile("pause");
+}
+
 static __inline register_t
 intr_disable(void)
 {
diff --git a/sys/i386/include/cpufunc.h b/sys/i386/include/cpufunc.h
index a77fda1fb5a3..e0b7c996071d 100644
--- a/sys/i386/include/cpufunc.h
+++ b/sys/i386/include/cpufunc.h
@@ -560,6 +560,12 @@ load_dr7(u_int sel)
 	__asm __volatile("movl %0,%%dr7" : : "r" (sel));
 }
 
+static __inline void
+cpu_pause(void)
+{
+	__asm __volatile("pause");
+}
+
 static __inline register_t
 intr_disable(void)
 {