[PATCH] x86: fix smp_num_siblings on buggy BIOSes
This fixes 'smp_num_siblings' value on the systems with a buggy bios, which sets number of siblings to '2' even when HT is disabled. (more details are at http://bugzilla.kernel.org/show_bug.cgi?id=4359) I am planning to do more cleanup in this area (like moving smp_num_siblings to per cpuinfo) shortly. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -1074,8 +1074,10 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
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cpu_set(cpu, cpu_sibling_map[cpu]);
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}
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if (siblings != smp_num_siblings)
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if (siblings != smp_num_siblings) {
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printk(KERN_WARNING "WARNING: %d siblings found for CPU%d, should be %d\n", siblings, cpu, smp_num_siblings);
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smp_num_siblings = siblings;
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}
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if (c->x86_num_cores > 1) {
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for (i = 0; i < NR_CPUS; i++) {
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