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authorBrian Gerst <brgerst@gmail.com>2010-09-09 18:17:26 +0200
committerTejun Heo <tj@kernel.org>2010-09-10 10:56:51 +0200
commit677243d7494d09bfa782425f063a6013de53c35b (patch)
tree5126d575a6097d0038a893119d05057a22bf03e6 /include/asm-generic
parentdb7829c6cc32f3c0c9a324118d743acb1abff081 (diff)
downloadlinux-677243d7494d09bfa782425f063a6013de53c35b.tar.bz2
percpu: Optimize __get_cpu_var()
Redefine __get_cpu_var() using this_cpu_ptr() which can be arch-optimized. Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/asm-generic')
-rw-r--r--include/asm-generic/percpu.h7
1 files changed, 3 insertions, 4 deletions
diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h
index ec643115bb56..d17784ea37ff 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