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d5a7430ddc
Convert cpu_sibling_map from a static array sized by NR_CPUS to a per_cpu variable. This saves sizeof(cpumask_t) * NR unused cpus. Access is mostly from startup and CPU HOTPLUG functions. Signed-off-by: Mike Travis <travis@sgi.com> Cc: Andi Kleen <ak@suse.de> Cc: Christoph Lameter <clameter@sgi.com> Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
/* smp.h: Sparc64 specific SMP stuff.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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*/
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#ifndef _SPARC64_SMP_H
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#define _SPARC64_SMP_H
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#include <linux/threads.h>
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#include <asm/asi.h>
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#include <asm/starfire.h>
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#include <asm/spitfire.h>
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#ifndef __ASSEMBLY__
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#include <linux/cpumask.h>
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#include <linux/cache.h>
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#endif /* !(__ASSEMBLY__) */
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#ifdef CONFIG_SMP
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#ifndef __ASSEMBLY__
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/*
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* Private routines/data
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*/
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#include <asm/bitops.h>
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#include <asm/atomic.h>
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#include <asm/percpu.h>
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DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
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extern cpumask_t cpu_core_map[NR_CPUS];
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extern int sparc64_multi_core;
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/*
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* General functions that each host system must provide.
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*/
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extern int hard_smp_processor_id(void);
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#define raw_smp_processor_id() (current_thread_info()->cpu)
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extern void smp_fill_in_sib_core_maps(void);
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extern void cpu_play_dead(void);
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#ifdef CONFIG_HOTPLUG_CPU
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extern int __cpu_disable(void);
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extern void __cpu_die(unsigned int cpu);
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#endif
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#endif /* !(__ASSEMBLY__) */
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#else
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#define hard_smp_processor_id() 0
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#define smp_fill_in_sib_core_maps() do { } while (0)
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#endif /* !(CONFIG_SMP) */
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#endif /* !(_SPARC64_SMP_H) */
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