From 44581a28e805a31661469c4b466b9cd14b36e7b6 Mon Sep 17 00:00:00 2001 From: Brian Gerst <brgerst@gmail.com> Date: Sun, 8 Feb 2009 09:58:40 -0500 Subject: [PATCH] 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> --- arch/x86/mm/numa_64.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c index 08d140fbc31b..deb1c1ab7868 100644 --- a/arch/x86/mm/numa_64.c +++ b/arch/x86/mm/numa_64.c @@ -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();