Disguising costs a few cycles in the hot paths. So switch it off if
we are not debuggin.
Signed-off-by: Christoph Lameter <[email protected]>
---
include/linux/percpu.h | 4 ++++
1 file changed, 4 insertions(+)
Index: linux-2.6/include/linux/percpu.h
===================================================================
--- linux-2.6.orig/include/linux/percpu.h 2007-10-31 16:40:14.892121256 -0700
+++ linux-2.6/include/linux/percpu.h 2007-10-31 16:41:00.907621059 -0700
@@ -33,7 +33,11 @@
#ifdef CONFIG_SMP
+#ifdef CONFIG_DEBUG_VM
#define __percpu_disguise(pdata) ((void *)~(unsigned long)(pdata))
+#else
+#define __percpu_disguide(pdata) ((void *)(pdata))
+#endif
/*
* Use this to get to a cpu's version of the per-cpu object dynamically
--
-
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