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

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/Kconfig
View File

@ -1706,6 +1706,10 @@ config HAVE_ARCH_EARLY_PFN_TO_NID
def_bool X86_64
depends on NUMA
config USE_PERCPU_NUMA_NODE_ID
def_bool X86_64
depends on NUMA
menu "Power management and ACPI options"
config ARCH_HIBERNATION_HEADER

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)
{

6
arch/x86/kernel/cpu/common.c
View File

@ -1121,9 +1121,9 @@ void __cpuinit cpu_init(void)
oist = &per_cpu(orig_ist, cpu);
#ifdef CONFIG_NUMA
if (cpu != 0 && percpu_read(node_number) == 0 &&
cpu_to_node(cpu) != NUMA_NO_NODE)
percpu_write(node_number, cpu_to_node(cpu));
if (cpu != 0 && percpu_read(numa_node) == 0 &&
early_cpu_to_node(cpu) != NUMA_NO_NODE)
set_numa_node(early_cpu_to_node(cpu));
#endif
me = current;

4
arch/x86/kernel/setup_percpu.c
View File

@ -265,10 +265,10 @@ void __init setup_per_cpu_areas(void)
#if defined(CONFIG_X86_64) && defined(CONFIG_NUMA)
/*
* make sure boot cpu node_number is right, when boot cpu is on the
* make sure boot cpu numa_node is right, when boot cpu is on the
* node that doesn't have mem installed
*/
per_cpu(node_number, boot_cpu_id) = cpu_to_node(boot_cpu_id);
set_cpu_numa_node(boot_cpu_id, early_cpu_to_node(boot_cpu_id));
#endif
/* Setup node to cpumask map */

9
arch/x86/mm/numa_64.c
View File

@ -33,9 +33,6 @@ int numa_off __initdata;
static unsigned long __initdata nodemap_addr;
static unsigned long __initdata nodemap_size;
DEFINE_PER_CPU(int, node_number) = 0;
EXPORT_PER_CPU_SYMBOL(node_number);
/*
* Map cpu index to node index
*/
@ -809,7 +806,7 @@ void __cpuinit numa_set_node(int cpu, int node)
per_cpu(x86_cpu_to_node_map, cpu) = node;
if (node != NUMA_NO_NODE)
per_cpu(node_number, cpu) = node;
set_cpu_numa_node(cpu, node);
}
void __cpuinit numa_clear_node(int cpu)
@ -867,7 +864,7 @@ void __cpuinit numa_remove_cpu(int cpu)
numa_set_cpumask(cpu, 0);
}
int cpu_to_node(int cpu)
int __cpu_to_node(int cpu)
{
if (early_per_cpu_ptr(x86_cpu_to_node_map)) {
printk(KERN_WARNING
@ -877,7 +874,7 @@ int cpu_to_node(int cpu)
}
return per_cpu(x86_cpu_to_node_map, cpu);
}
EXPORT_SYMBOL(cpu_to_node);
EXPORT_SYMBOL(__cpu_to_node);
/*
* Same function as cpu_to_node() but used if called before the