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-rw-r--r--linuxthreads/sysdeps/i386/i686/pt-machine.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/linuxthreads/sysdeps/i386/i686/pt-machine.h b/linuxthreads/sysdeps/i386/i686/pt-machine.h
index 7df3e7e487..c7396024bb 100644
--- a/linuxthreads/sysdeps/i386/i686/pt-machine.h
+++ b/linuxthreads/sysdeps/i386/i686/pt-machine.h
@@ -64,3 +64,6 @@ __compare_and_swap (long int *p, long int oldval, long int newval)
#if __ASSUME_LDT_WORKS > 0
#include "../useldt.h"
#endif
+
+/* The P4 and above really want some help to prevent overheating. */
+#define BUSY_WAIT_NOP __asm__ ("rep; nop")