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Subject[PATCH 2/2] percpu: Optimize __get_cpu_var()
Date
Redefine __get_cpu_var() using this_cpu_ptr() which can be
arch-optimized.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
include/asm-generic/percpu.h | 7 +++----
1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h
index 5820fcb..c6e2c2d 100644
--- a/include/asm-generic/percpu.h
+++ b/include/asm-generic/percpu.h
@@ -55,10 +55,6 @@ extern unsigned long __per_cpu_offset[NR_CPUS];
*/
#define per_cpu(var, cpu) \
(*SHIFT_PERCPU_PTR(&(var), per_cpu_offset(cpu)))
-#define __get_cpu_var(var) \
- (*SHIFT_PERCPU_PTR(&(var), my_cpu_offset))
-#define __raw_get_cpu_var(var) \
- (*SHIFT_PERCPU_PTR(&(var), __my_cpu_offset))

#ifndef __this_cpu_ptr
#define __this_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, __my_cpu_offset)
@@ -69,6 +65,9 @@ extern unsigned long __per_cpu_offset[NR_CPUS];
#define this_cpu_ptr(ptr) __this_cpu_ptr(ptr)
#endif

+#define __get_cpu_var(var) (*this_cpu_ptr(&(var)))
+#define __raw_get_cpu_var(var) (*__this_cpu_ptr(&(var)))
+
#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
extern void setup_per_cpu_areas(void);
#endif
--
1.7.2.2


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