[PATCH 09/10] ia64: Use generic percpu

travis
2008-01-08T02:12:48Z

[-- Attachment #1: ia64_generic_percpu --]
[-- Type: text/plain, Size: 3232 bytes --]

V1->V2:
- Merge fixes
- Remove transitional check for PER_CPU_ATTRIBUTES from linux/percpu.h

V2-.V3:
- use generic percpy_modcopy()

ia64 has a special processor specific mapping that can be used to locate the
offset for the current per cpu area.

Cc: linux-ia64@vger.kernel.org
Cc: tony.luck@intel.com
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>

---
arch/ia64/kernel/module.c | 11 -----------
include/asm-ia64/percpu.h | 29 +++++++----------------------
include/linux/percpu.h | 4 ----
3 files changed, 7 insertions(+), 37 deletions(-)

--- a/arch/ia64/kernel/module.c
+++ b/arch/ia64/kernel/module.c
@@ -940,14 +940,3 @@ module_arch_cleanup (struct module *mod)
if (mod->arch.core_unw_table)
unw_remove_unwind_table(mod->arch.core_unw_table);
}
-
-#ifdef CONFIG_SMP
-void
-percpu_modcopy (void *pcpudst, const void *src, unsigned long size)
-{
- unsigned int i;
- for_each_possible_cpu(i) {
- memcpy(pcpudst + per_cpu_offset(i), src, size);
- }
-}
-#endif /* CONFIG_SMP */
--- a/include/asm-ia64/percpu.h
+++ b/include/asm-ia64/percpu.h
@@ -19,34 +19,14 @@
# define PER_CPU_ATTRIBUTES __attribute__((__model__ (__small__)))
#endif

-#define DECLARE_PER_CPU(type, name) \
- extern PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
-
-/*
- * Pretty much a literal copy of asm-generic/percpu.h, except that percpu_modcopy() is an
- * external routine, to avoid include-hell.
- */
#ifdef CONFIG_SMP

-extern unsigned long __per_cpu_offset[NR_CPUS];
-#define per_cpu_offset(x) (__per_cpu_offset[x])
-
-/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
-DECLARE_PER_CPU(unsigned long, local_per_cpu_offset);
+#define __my_cpu_offset __ia64_per_cpu_var(local_per_cpu_offset)

-#define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu]))
-#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset)))
-#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __ia64_per_cpu_var(local_per_cpu_offset)))
-
-extern void percpu_modcopy(void *pcpudst, const void *src, unsigned long size);
-extern void setup_per_cpu_areas (void);
extern void *per_cpu_init(void);

#else /* ! SMP */

-#define per_cpu(var, cpu) (*((void)(cpu), &per_cpu__##var))
-#define __get_cpu_var(var) per_cpu__##var
-#define __raw_get_cpu_var(var) per_cpu__##var
#define per_cpu_init() (__phys_per_cpu_start)

#endif /* SMP */
@@ -57,7 +37,12 @@ extern void *per_cpu_init(void);
* On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
* more efficient.
*/
-#define __ia64_per_cpu_var(var) (per_cpu__##var)
+#define __ia64_per_cpu_var(var) per_cpu__##var
+
+#include <asm-generic/percpu.h>
+
+/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
+DECLARE_PER_CPU(unsigned long, local_per_cpu_offset);

#endif /* !__ASSEMBLY__ */

--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -9,10 +9,6 @@

#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"))) \

--