2005-04-16 16:20:36 -06:00
|
|
|
#ifndef __ARCH_SPARC64_PERCPU__
|
|
|
|
#define __ARCH_SPARC64_PERCPU__
|
|
|
|
|
|
|
|
#include <linux/compiler.h>
|
|
|
|
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
|
2006-12-15 00:40:57 -07:00
|
|
|
#ifdef CONFIG_MODULES
|
|
|
|
# define PERCPU_MODULE_RESERVE 8192
|
|
|
|
#else
|
|
|
|
# define PERCPU_MODULE_RESERVE 0
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#define PERCPU_ENOUGH_ROOM \
|
|
|
|
(ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) + \
|
|
|
|
PERCPU_MODULE_RESERVE)
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
extern void setup_per_cpu_areas(void);
|
|
|
|
|
|
|
|
extern unsigned long __per_cpu_base;
|
|
|
|
extern unsigned long __per_cpu_shift;
|
|
|
|
#define __per_cpu_offset(__cpu) \
|
|
|
|
(__per_cpu_base + ((unsigned long)(__cpu) << __per_cpu_shift))
|
2006-07-03 01:24:26 -06:00
|
|
|
#define per_cpu_offset(x) (__per_cpu_offset(x))
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* Separate out the type, so (int[3], foo) works. */
|
|
|
|
#define DEFINE_PER_CPU(type, name) \
|
|
|
|
__attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
|
|
|
|
|
|
|
|
register unsigned long __local_per_cpu_offset asm("g5");
|
|
|
|
|
|
|
|
/* 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))
|
[PATCH] Define __raw_get_cpu_var and use it
There are several instances of per_cpu(foo, raw_smp_processor_id()), which
is semantically equivalent to __get_cpu_var(foo) but without the warning
that smp_processor_id() can give if CONFIG_DEBUG_PREEMPT is enabled. For
those architectures with optimized per-cpu implementations, namely ia64,
powerpc, s390, sparc64 and x86_64, per_cpu() turns into more and slower
code than __get_cpu_var(), so it would be preferable to use __get_cpu_var
on those platforms.
This defines a __raw_get_cpu_var(x) macro which turns into per_cpu(x,
raw_smp_processor_id()) on architectures that use the generic per-cpu
implementation, and turns into __get_cpu_var(x) on the architectures that
have an optimized per-cpu implementation.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-25 06:47:14 -06:00
|
|
|
#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* A macro to avoid #include hell... */
|
|
|
|
#define percpu_modcopy(pcpudst, src, size) \
|
|
|
|
do { \
|
|
|
|
unsigned int __i; \
|
2006-04-10 23:52:52 -06:00
|
|
|
for_each_possible_cpu(__i) \
|
2006-03-23 04:01:05 -07:00
|
|
|
memcpy((pcpudst)+__per_cpu_offset(__i), \
|
|
|
|
(src), (size)); \
|
2005-04-16 16:20:36 -06:00
|
|
|
} while (0)
|
|
|
|
#else /* ! SMP */
|
|
|
|
|
|
|
|
#define DEFINE_PER_CPU(type, name) \
|
|
|
|
__typeof__(type) per_cpu__##name
|
|
|
|
|
|
|
|
#define per_cpu(var, cpu) (*((void)cpu, &per_cpu__##var))
|
|
|
|
#define __get_cpu_var(var) per_cpu__##var
|
[PATCH] Define __raw_get_cpu_var and use it
There are several instances of per_cpu(foo, raw_smp_processor_id()), which
is semantically equivalent to __get_cpu_var(foo) but without the warning
that smp_processor_id() can give if CONFIG_DEBUG_PREEMPT is enabled. For
those architectures with optimized per-cpu implementations, namely ia64,
powerpc, s390, sparc64 and x86_64, per_cpu() turns into more and slower
code than __get_cpu_var(), so it would be preferable to use __get_cpu_var
on those platforms.
This defines a __raw_get_cpu_var(x) macro which turns into per_cpu(x,
raw_smp_processor_id()) on architectures that use the generic per-cpu
implementation, and turns into __get_cpu_var(x) on the architectures that
have an optimized per-cpu implementation.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-25 06:47:14 -06:00
|
|
|
#define __raw_get_cpu_var(var) per_cpu__##var
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
#endif /* SMP */
|
|
|
|
|
|
|
|
#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
|
|
|
|
|
|
|
|
#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
|
|
|
|
#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
|
|
|
|
|
|
|
|
#endif /* __ARCH_SPARC64_PERCPU__ */
|