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x86: clean up non-smp usage of cpu maps

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Cleanup references to the early cpu maps for the non-SMP configuration
and remove some functions called for SMP configurations only.

Cc: Andi Kleen <ak@suse.de>
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mike Travis 2008-03-25 15:06:51 -07:00 committed by Ingo Molnar
parent a24eae88ad
commit b447a468fc
4 changed files with 30 additions and 22 deletions
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28
arch/x86/kernel/setup.c
View file

@ -10,7 +10,7 @@
#include <asm/setup.h>
#include <asm/topology.h>
#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA
#if defined(CONFIG_HAVE_SETUP_PER_CPU_AREA) && defined(CONFIG_SMP)
/*
* Copy data used in early init routines from the initial arrays to the
* per cpu data areas. These arrays then become expendable and the
@ -21,21 +21,12 @@ static void __init setup_per_cpu_maps(void)
int cpu;
for_each_possible_cpu(cpu) {
#ifdef CONFIG_SMP
if (per_cpu_offset(cpu)) {
#endif
per_cpu(x86_cpu_to_apicid, cpu) =
x86_cpu_to_apicid_init[cpu];
per_cpu(x86_bios_cpu_apicid, cpu) =
per_cpu(x86_cpu_to_apicid, cpu) = x86_cpu_to_apicid_init[cpu];
per_cpu(x86_bios_cpu_apicid, cpu) =
x86_bios_cpu_apicid_init[cpu];
#ifdef CONFIG_NUMA
per_cpu(x86_cpu_to_node_map, cpu) =
per_cpu(x86_cpu_to_node_map, cpu) =
x86_cpu_to_node_map_init[cpu];
#endif
#ifdef CONFIG_SMP
} else
printk(KERN_NOTICE "per_cpu_offset zero for cpu %d\n",
cpu);
#endif
}
@ -72,17 +63,20 @@ void __init setup_per_cpu_areas(void)
/* Copy section for each CPU (we discard the original) */
size = PERCPU_ENOUGH_ROOM;
printk(KERN_INFO "PERCPU: Allocating %lu bytes of per cpu data\n",
size);
for_each_cpu_mask(i, cpu_possible_map) {
for_each_possible_cpu(i) {
char *ptr;
#ifndef CONFIG_NEED_MULTIPLE_NODES
ptr = alloc_bootmem_pages(size);
#else
int node = early_cpu_to_node(i);
if (!node_online(node) || !NODE_DATA(node))
if (!node_online(node) || !NODE_DATA(node)) {
ptr = alloc_bootmem_pages(size);
printk(KERN_INFO
"cpu %d has no node or node-local memory\n", i);
}
else
ptr = alloc_bootmem_pages_node(NODE_DATA(node), size);
#endif
@ -96,7 +90,7 @@ void __init setup_per_cpu_areas(void)
memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
}
/* setup percpu data maps early */
/* Setup percpu data maps */
setup_per_cpu_maps();
}

4
arch/x86/mm/numa_64.c
View file

@ -31,13 +31,15 @@ bootmem_data_t plat_node_bdata[MAX_NUMNODES];
struct memnode memnode;
#ifdef CONFIG_SMP
int x86_cpu_to_node_map_init[NR_CPUS] = {
[0 ... NR_CPUS-1] = NUMA_NO_NODE
};
void *x86_cpu_to_node_map_early_ptr;
EXPORT_SYMBOL(x86_cpu_to_node_map_early_ptr);
#endif
DEFINE_PER_CPU(int, x86_cpu_to_node_map) = NUMA_NO_NODE;
EXPORT_PER_CPU_SYMBOL(x86_cpu_to_node_map);
EXPORT_SYMBOL(x86_cpu_to_node_map_early_ptr);
s16 apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = {
[0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE

5
include/asm-x86/smp.h
View file

@ -29,10 +29,15 @@ extern int smp_num_siblings;
extern unsigned int num_processors;
extern cpumask_t cpu_initialized;
#ifdef CONFIG_SMP
extern u16 x86_cpu_to_apicid_init[];
extern u16 x86_bios_cpu_apicid_init[];
extern void *x86_cpu_to_apicid_early_ptr;
extern void *x86_bios_cpu_apicid_early_ptr;
#else
#define x86_cpu_to_apicid_early_ptr NULL
#define x86_bios_cpu_apicid_early_ptr NULL
#endif
DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
DECLARE_PER_CPU(cpumask_t, cpu_core_map);

15
include/asm-x86/topology.h
View file

@ -38,8 +38,13 @@ extern int cpu_to_node_map[];
#endif
DECLARE_PER_CPU(int, x86_cpu_to_node_map);
#ifdef CONFIG_SMP
extern int x86_cpu_to_node_map_init[];
extern void *x86_cpu_to_node_map_early_ptr;
#else
#define x86_cpu_to_node_map_early_ptr NULL
#endif
extern cpumask_t node_to_cpumask_map[];
@ -54,6 +59,8 @@ static inline int cpu_to_node(int cpu)
}
#else /* CONFIG_X86_64 */
#ifdef CONFIG_SMP
static inline int early_cpu_to_node(int cpu)
{
int *cpu_to_node_map = x86_cpu_to_node_map_early_ptr;
@ -65,6 +72,9 @@ static inline int early_cpu_to_node(int cpu)
else
return NUMA_NO_NODE;
}
#else
#define early_cpu_to_node(cpu) cpu_to_node(cpu)
#endif
static inline int cpu_to_node(int cpu)
{
@ -76,10 +86,7 @@ static inline int cpu_to_node(int cpu)
return ((int *)x86_cpu_to_node_map_early_ptr)[cpu];
}
#endif
if (per_cpu_offset(cpu))
return per_cpu(x86_cpu_to_node_map, cpu);
else
return NUMA_NO_NODE;
return per_cpu(x86_cpu_to_node_map, cpu);
}
#endif /* CONFIG_X86_64 */