[patch 22/61] lock validator: add per_cpu_offset()

[Ingo Molnar]

From: Ingo Molnar <mingo@xxxxxxx>

add the per_cpu_offset() generic method. (used by the lock validator)

Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
---
 include/asm-generic/percpu.h |    2 ++
 include/asm-x86_64/percpu.h  |    2 ++
 2 files changed, 4 insertions(+)

Index: linux/include/asm-generic/percpu.h
===================================================================
--- linux.orig/include/asm-generic/percpu.h
+++ linux/include/asm-generic/percpu.h
@@ -7,6 +7,8 @@
 
 extern unsigned long __per_cpu_offset[NR_CPUS];
 
+#define per_cpu_offset(x) (__per_cpu_offset[x])
+
 /* Separate out the type, so (int[3], foo) works. */
 #define DEFINE_PER_CPU(type, name) \
     __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
Index: linux/include/asm-x86_64/percpu.h
===================================================================
--- linux.orig/include/asm-x86_64/percpu.h
+++ linux/include/asm-x86_64/percpu.h
@@ -14,6 +14,8 @@
 #define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset)
 #define __my_cpu_offset() read_pda(data_offset)
 
+#define per_cpu_offset(x) (__per_cpu_offset(x))
+
 /* Separate out the type, so (int[3], foo) works. */
 #define DEFINE_PER_CPU(type, name) \
     __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
-
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