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-rw-r--r--arch/x86/kernel/setup.c28
-rw-r--r--arch/x86/mm/numa_64.c4
-rw-r--r--include/asm-x86/smp.h5
-rw-r--r--include/asm-x86/topology.h15
4 files changed, 30 insertions, 22 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 1179aa06cdb..dc7940955b7 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -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
@@ -21,22 +21,13 @@ 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
}
/* indicate the early static arrays will soon be gone */
@@ -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();
}
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 18267a02e67..2ea56f48f29 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -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
diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h
index 654724c58f5..d973c11688c 100644
--- a/include/asm-x86/smp.h
+++ b/include/asm-x86/smp.h
@@ -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);
diff --git a/include/asm-x86/topology.h b/include/asm-x86/topology.h
index 8d1a1f3d21b..81a29eb08ac 100644
--- a/include/asm-x86/topology.h
+++ b/include/asm-x86/topology.h
@@ -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 */