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Subject[PATCH 13/13] use cpu_relax() in busy loop
Replace busy loop rep_nop() with cpu_relax().

This is bordering on a gratuitous change given the x86_64 def'n of
cpu_relax(). But I was fixing up other busy loops, and my grep found
this one.

===== arch/x86_64/kernel/smpboot.c 1.21 vs edited =====
--- 1.21/arch/x86_64/kernel/smpboot.c Sat Aug 23 05:13:33 2003
+++ edited/arch/x86_64/kernel/smpboot.c Thu Sep 18 10:26:41 2003
@@ -282,7 +282,7 @@
*/
if (cpu_isset(cpuid, cpu_callout_map))
break;
- rep_nop();
+ cpu_relax();
}

if (!time_before(jiffies, timeout)) {
-
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