commit c56334dbf7e8772ed84390bc4664427f0a7f3b25
author Al Viro <viro@zeniv.linux.org.uk> Sun Nov 20 17:23:39 2011 -0500
committer Richard Weinberger <richard@nod.at> Sun Mar 25 00:29:55 2012 +0100
tree 7deaf851c0baa7bab6eb9446093833e81f57683a
parent 10c890c0a303070652f5374ea31a0b29350d14d9

um: merge processor_{32,64}.h a bit...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/x86/um/asm/processor.h

diff --git a/arch/x86/um/asm/processor.h b/arch/x86/um/asm/processor.h
index 2c32df6..04f82e0 100644
--- a/arch/x86/um/asm/processor.h
+++ b/arch/x86/um/asm/processor.h
@@ -17,6 +17,16 @@
 #define ARCH_IS_STACKGROW(address) \
        (address + 65536 + 32 * sizeof(unsigned long) >= UPT_SP(&current->thread.regs.regs))
 
+#include <asm/user.h>
+
+/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
+static inline void rep_nop(void)
+{
+	__asm__ __volatile__("rep;nop": : :"memory");
+}
+
+#define cpu_relax()	rep_nop()
+
 #include <asm/processor-generic.h>
 
 #endif