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| author | travis@sgi.com <travis@sgi.com> | 2008-01-30 13:33:22 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:22 +0100 |
| commit | c49a4955ea504c82f6b690491639bba5b8c1dc47 (patch) | |
| tree | badef899e3e3376c1af68b942b7f6c8ff9a36df5 /include/asm-x86/topology.h | |
| parent | 602a54a8cab2759fceb20b3e0c2a27c4eac005df (diff) | |
| download | op-kernel-dev-c49a4955ea504c82f6b690491639bba5b8c1dc47.zip op-kernel-dev-c49a4955ea504c82f6b690491639bba5b8c1dc47.tar.gz | |
x86: add debug of invalid per_cpu map accesses
Provide a means to trap usages of per_cpu map variables before
they are setup. Define CONFIG_DEBUG_PER_CPU_MAPS to activate.
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/topology.h')
| -rw-r--r-- | include/asm-x86/topology.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/asm-x86/topology.h b/include/asm-x86/topology.h index 040374f..f1e1232 100644 --- a/include/asm-x86/topology.h +++ b/include/asm-x86/topology.h @@ -66,6 +66,13 @@ 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) { + printk("KERN_NOTICE cpu_to_node(%d): usage too early!\n", + (int)cpu); + BUG(); + } +#endif if(per_cpu_offset(cpu)) return per_cpu(x86_cpu_to_node_map, cpu); else |
