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authortravis@sgi.com <travis@sgi.com>2008-01-30 13:32:52 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:32:52 +0100
commit5280e004fc22314122c84978c0b6a741cf96dc0f (patch)
tree008b96d81a924be764629f62f98fa5f7c9e04773 /include/linux
parentb32ef636a59aad12f9f9b5dc34c93222842c58ba (diff)
percpu: move arch XX_PER_CPU_XX definitions into linux/percpu.h
- Special consideration for IA64: Add the ability to specify arch specific per cpu flags - remove .data.percpu attribute from DEFINE_PER_CPU for non-smp case. The arch definitions are all the same. So move them into linux/percpu.h. We cannot move DECLARE_PER_CPU since some include files just include asm/percpu.h to avoid include recursion problems. Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/percpu.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 926adaae0f9..00412bb494c 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -9,6 +9,30 @@
#include <asm/percpu.h>
+#ifndef PER_CPU_ATTRIBUTES
+#define PER_CPU_ATTRIBUTES
+#endif
+
+#ifdef CONFIG_SMP
+#define DEFINE_PER_CPU(type, name) \
+ __attribute__((__section__(".data.percpu"))) \
+ PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
+
+#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
+ __attribute__((__section__(".data.percpu.shared_aligned"))) \
+ PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name \
+ ____cacheline_aligned_in_smp
+#else
+#define DEFINE_PER_CPU(type, name) \
+ PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
+
+#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
+ DEFINE_PER_CPU(type, name)
+#endif
+
+#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
+#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
+
/* Enough to cover all DEFINE_PER_CPUs in kernel, including modules. */
#ifndef PERCPU_ENOUGH_ROOM
#ifdef CONFIG_MODULES