Allocpercpu: Remove __percpu_disguise() function

Disguising costs a few cycles in the hot paths and its optional anyways.
So remove it.

If its useful for debugging then we could retain it under CONFIG_DEBUG_VM?

Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
 include/linux/percpu.h |    3 +--
 mm/allocpercpu.c       |    4 ++--
 2 files changed, 3 insertions(+), 4 deletions(-)

Index: linux-2.6/include/linux/percpu.h
===================================================================
--- linux-2.6.orig/include/linux/percpu.h	2007-10-31 14:22:11.201376723 -0700
+++ linux-2.6/include/linux/percpu.h	2007-10-31 14:27:12.574126419 -0700
@@ -33,7 +33,6 @@
 
 #ifdef CONFIG_SMP
 
-#define __percpu_disguise(pdata) (struct percpu_data *)~(unsigned long)(pdata)
 /* 
  * Use this to get to a cpu's version of the per-cpu object dynamically
  * allocated. Non-atomic access to the current CPU's version should
@@ -41,7 +40,7 @@
  */ 
 #define percpu_ptr(ptr, cpu)           			\
 ({							\
-	void *p = __percpu_disguise(ptr);		\
+	void *p = ptr;					\
 	unsigned long q = per_cpu_offset(cpu);		\
     	(__typeof__(ptr))(p + q);			\
 })
Index: linux-2.6/mm/allocpercpu.c
===================================================================
--- linux-2.6.orig/mm/allocpercpu.c	2007-10-31 14:21:12.905127138 -0700
+++ linux-2.6/mm/allocpercpu.c	2007-10-31 14:27:12.578126588 -0700
@@ -143,7 +143,7 @@ static inline void cpu_free(void *pcpu)
 void *__alloc_percpu(size_t size)
 {
 	void *pdata = cpu_alloc(size);
-	void *__pdata = __percpu_disguise(pdata);
+	void *__pdata = pdata;
 	int cpu;
 
 	if (unlikely(!pdata))
@@ -164,7 +164,7 @@ void percpu_free(void *__pdata)
 {
 	if (unlikely(!__pdata))
 		return;
-	cpu_free(__percpu_disguise(__pdata));
+	cpu_free(__pdata);
 }
 EXPORT_SYMBOL_GPL(percpu_free);