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-rw-r--r--arch/sparc/include/asm/processor_64.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h
index c7c79fe8d265..aac23d4a4ddd 100644
--- a/arch/sparc/include/asm/processor_64.h
+++ b/arch/sparc/include/asm/processor_64.h
@@ -200,6 +200,13 @@ unsigned long get_wchan(struct task_struct *task);
* To make a long story short, we are trying to yield the current cpu
* strand during busy loops.
*/
+#ifdef BUILD_VDSO
+#define cpu_relax() asm volatile("\n99:\n\t" \
+ "rd %%ccr, %%g0\n\t" \
+ "rd %%ccr, %%g0\n\t" \
+ "rd %%ccr, %%g0\n\t" \
+ ::: "memory")
+#else /* ! BUILD_VDSO */
#define cpu_relax() asm volatile("\n99:\n\t" \
"rd %%ccr, %%g0\n\t" \
"rd %%ccr, %%g0\n\t" \
@@ -211,6 +218,7 @@ unsigned long get_wchan(struct task_struct *task);
"nop\n\t" \
".previous" \
::: "memory")
+#endif
/* Prefetch support. This is tuned for UltraSPARC-III and later.
* UltraSPARC-I will treat these as nops, and UltraSPARC-II has