From 3afc620229ccc8214ef96fd0e7db26d79f788167 Mon Sep 17 00:00:00 2001 From: "travis@sgi.com" Date: Wed, 30 Jan 2008 23:27:58 +0100 Subject: [PATCH] SPARC64: use generic percpu 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. Cc: David Miller Signed-off-by: Mike Travis Signed-off-by: Ingo Molnar --- arch/sparc64/mm/init.c | 5 +++++ include/asm-sparc64/percpu.h | 22 +++------------------- 2 files changed, 8 insertions(+), 19 deletions(-) diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index fbeb55d71e..523e993ee9 100644 --- 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; diff --git a/include/asm-sparc64/percpu.h b/include/asm-sparc64/percpu.h index c7e52decba..bee6459302 100644 --- a/include/asm-sparc64/percpu.h +++ b/include/asm-sparc64/percpu.h @@ -7,7 +7,6 @@ register unsigned long __local_per_cpu_offset asm("g5"); #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 #endif /* __ARCH_SPARC64_PERCPU__ */ -- 2.39.5