From 5f5cd8fd60c71ce47d2ce4e60e7ccbc306e91c64 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Wed, 30 Jan 2008 13:33:23 +0100 Subject: [PATCH] x86: add debug of invalid per_cpu map accesses dont crash survivable situations. Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- include/asm-x86/topology.h | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/include/asm-x86/topology.h b/include/asm-x86/topology.h index f1e12329078e..9a8228a177c7 100644 --- a/include/asm-x86/topology.h +++ b/include/asm-x86/topology.h @@ -66,14 +66,15 @@ static inline int early_cpu_to_node(int cpu) static inline int cpu_to_node(int cpu) { -#ifdef CONFIG_DEBUG_PER_CPU_MAPS - if(x86_cpu_to_node_map_early_ptr) { +#ifdef CONFIG_DEBUG_PER_CPU_MAPS + if (x86_cpu_to_node_map_early_ptr) { printk("KERN_NOTICE cpu_to_node(%d): usage too early!\n", (int)cpu); - BUG(); + dump_stack(); + return ((int *)x86_cpu_to_node_map_early_ptr)[cpu]; } #endif - if(per_cpu_offset(cpu)) + if (per_cpu_offset(cpu)) return per_cpu(x86_cpu_to_node_map, cpu); else return NUMA_NO_NODE; -- 2.20.1