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x86: fix abuse of per_cpu_offset 

Impact: bug fix

Don't use per_cpu_offset() to determine if it valid to access a
per-cpu variable for a given cpu number.  It is not a valid assumption
on x86-64 anymore. Use cpu_possible() instead.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Brian Gerst 2009-02-08 09:58:40 -05:00 committed by Ingo Molnar
parent 2add8e235c
commit 44581a28e8
1 changed files with 2 additions and 2 deletions
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4
arch/x86/mm/numa_64.c
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@ -702,7 +702,7 @@ void __cpuinit numa_set_node(int cpu, int node)
}
#ifdef CONFIG_DEBUG_PER_CPU_MAPS
if (cpu >= nr_cpu_ids || !per_cpu_offset(cpu)) {
if (cpu >= nr_cpu_ids || !cpu_possible(cpu)) {
printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu);
dump_stack();
return;
@ -790,7 +790,7 @@ int early_cpu_to_node(int cpu)
if (early_per_cpu_ptr(x86_cpu_to_node_map))
return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
if (!per_cpu_offset(cpu)) {
if (!cpu_possible(cpu)) {
printk(KERN_WARNING
"early_cpu_to_node(%d): no per_cpu area!\n", cpu);
dump_stack();