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Diffstat (limited to 'include/linux/percpu.h')
-rw-r--r--include/linux/percpu.h47
1 files changed, 29 insertions, 18 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 9f2a3751873a..3577ffd90d45 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -8,35 +8,46 @@
#include <asm/percpu.h>
+#ifndef PER_CPU_BASE_SECTION
+#ifdef CONFIG_SMP
+#define PER_CPU_BASE_SECTION ".data.percpu"
+#else
+#define PER_CPU_BASE_SECTION ".data"
+#endif
+#endif
+
#ifdef CONFIG_SMP
-#define DEFINE_PER_CPU(type, name) \
- __attribute__((__section__(".data.percpu"))) \
- PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
#ifdef MODULE
-#define SHARED_ALIGNED_SECTION ".data.percpu"
+#define PER_CPU_SHARED_ALIGNED_SECTION ""
#else
-#define SHARED_ALIGNED_SECTION ".data.percpu.shared_aligned"
+#define PER_CPU_SHARED_ALIGNED_SECTION ".shared_aligned"
#endif
+#define PER_CPU_FIRST_SECTION ".first"
-#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
- __attribute__((__section__(SHARED_ALIGNED_SECTION))) \
- PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name \
- ____cacheline_aligned_in_smp
+#else
-#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name) \
- __attribute__((__section__(".data.percpu.page_aligned"))) \
+#define PER_CPU_SHARED_ALIGNED_SECTION ""
+#define PER_CPU_FIRST_SECTION ""
+
+#endif
+
+#define DEFINE_PER_CPU_SECTION(type, name, section) \
+ __attribute__((__section__(PER_CPU_BASE_SECTION section))) \
PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
-#else
+
#define DEFINE_PER_CPU(type, name) \
- PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
+ DEFINE_PER_CPU_SECTION(type, name, "")
-#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
- DEFINE_PER_CPU(type, name)
+#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
+ DEFINE_PER_CPU_SECTION(type, name, PER_CPU_SHARED_ALIGNED_SECTION) \
+ ____cacheline_aligned_in_smp
-#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name) \
- DEFINE_PER_CPU(type, name)
-#endif
+#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name) \
+ DEFINE_PER_CPU_SECTION(type, name, ".page_aligned")
+
+#define DEFINE_PER_CPU_FIRST(type, name) \
+ DEFINE_PER_CPU_SECTION(type, name, PER_CPU_FIRST_SECTION)
#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)