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Subject[PATCH 4/7] ia64: Use generic percpu fixup rc8-mm1-fixup with git-x86
ia64 has a special processor specific mapping that can be used to locate the
offset for the current per cpu area.

Based on 2.6.24-rc8-mm1 + latest (08/1/21) git-x86

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>
---
rc8-mm1-fixup:
- rebased from 2.6.24-rc6-mm1 to 2.6.24-rc8-mm1
(removed changes that are in the git-x86.patch)
---
V1->V2:
- Merge fixes
- Remove transitional check for PER_CPU_ATTRIBUTES from linux/percpu.h
V2-.V3:
- use generic percpy_modcopy()
---
arch/ia64/Kconfig | 2 +-
include/asm-ia64/percpu.h | 24 +++++++-----------------
include/linux/percpu.h | 4 ----
3 files changed, 8 insertions(+), 22 deletions(-)
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -80,7 +80,7 @@ config GENERIC_TIME_VSYSCALL
bool
default y

-config ARCH_SETS_UP_PER_CPU_AREA
+config HAVE_SETUP_PER_CPU_AREA
def_bool y

config DMI
--- a/include/asm-ia64/percpu.h
+++ b/include/asm-ia64/percpu.h
@@ -19,29 +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
-
#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 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)))
+#define __my_cpu_offset __ia64_per_cpu_var(local_per_cpu_offset)

-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 */
@@ -52,7 +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"))) \
--


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