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Subject[PATCH 4/8] Sparc64: Use generic percpu fixup rc8-mm1-fixup
Sparc64 has a way of providing the base address for the per cpu area of the
currently executing processor in a global register.

Sparc64 also provides a way to calculate the address of a per cpu area
from a base address instead of performing an array lookup.

Based on: 2.6.24-rc8-mm1

Cc: David Miller <davem@davemloft.net>
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)
---
arch/sparc64/mm/init.c | 5 +++++
include/asm-sparc64/percpu.h | 22 +++-------------------
2 files changed, 8 insertions(+), 19 deletions(-)
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -1328,6 +1328,11 @@ pgd_t swapper_pg_dir[2048];
static void sun4u_pgprot_init(void);
static void sun4v_pgprot_init(void);

+/* Dummy function */
+void __init setup_per_cpu_areas(void)
+{
+}
+
void __init paging_init(void)
{
unsigned long end_pfn, pages_avail, shift, phys_base;
--- a/include/asm-sparc64/percpu.h
+++ b/include/asm-sparc64/percpu.h
@@ -7,7 +7,6 @@ register unsigned long __local_per_cpu_o

#ifdef CONFIG_SMP

-#define setup_per_cpu_areas() do { } while (0)
extern void real_setup_per_cpu_areas(void);

extern unsigned long __per_cpu_base;
@@ -16,29 +15,14 @@ extern unsigned long __per_cpu_shift;
(__per_cpu_base + ((unsigned long)(__cpu) << __per_cpu_shift))
#define per_cpu_offset(x) (__per_cpu_offset(x))

-/* var is in discarded region: offset to particular copy we want */
-#define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
-#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
-#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
-
-/* A macro to avoid #include hell... */
-#define percpu_modcopy(pcpudst, src, size) \
-do { \
- unsigned int __i; \
- for_each_possible_cpu(__i) \
- memcpy((pcpudst)+__per_cpu_offset(__i), \
- (src), (size)); \
-} while (0)
+#define __my_cpu_offset __local_per_cpu_offset
+
#else /* ! SMP */

#define real_setup_per_cpu_areas() do { } while (0)

-#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
-
#endif /* SMP */

-#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
+#include <asm-generic/percpu.h>

#endif /* __ARCH_SPARC64_PERCPU__ */
--


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