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numa: x86_64: use generic percpu var numa_node_id() implementation

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x86 arch specific changes to use generic numa_node_id() based on generic
percpu variable infrastructure.  Back out x86's custom version of
numa_node_id()

Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Nick Piggin <npiggin@suse.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Eric Whitney <eric.whitney@hp.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lee Schermerhorn 2010-05-26 14:44:58 -07:00 • committed by Linus Torvalds
parent 7281201922
commit e534c7c5f8
5 changed files with 21 additions and 24 deletions
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22
arch/x86/include/asm/topology.h
View file

@ -53,33 +53,29 @@
extern int cpu_to_node_map[];
/* Returns the number of the node containing CPU 'cpu' */
static inline int cpu_to_node(int cpu)
static inline int __cpu_to_node(int cpu)
{
return cpu_to_node_map[cpu];
}
#define early_cpu_to_node(cpu) cpu_to_node(cpu)
#define early_cpu_to_node __cpu_to_node
#define cpu_to_node __cpu_to_node
#else /* CONFIG_X86_64 */
/* Mappings between logical cpu number and node number */
DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
/* Returns the number of the current Node. */
DECLARE_PER_CPU(int, node_number);
#define numa_node_id() percpu_read(node_number)
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
extern int cpu_to_node(int cpu);
/*
* override generic percpu implementation of cpu_to_node
*/
extern int __cpu_to_node(int cpu);
#define cpu_to_node __cpu_to_node
extern int early_cpu_to_node(int cpu);
#else /* !CONFIG_DEBUG_PER_CPU_MAPS */
/* Returns the number of the node containing CPU 'cpu' */
static inline int cpu_to_node(int cpu)
{
return per_cpu(x86_cpu_to_node_map, cpu);
}
/* Same function but used if called before per_cpu areas are setup */
static inline int early_cpu_to_node(int cpu)
{