x86/topology: Handle CPUID bogosity gracefully

[cascardo/linux.git] / arch / x86 / kernel / smpboot.c

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index a2065d3..0e4329e 100644 (file)
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -332,6 +332,11 @@ static void __init smp_init_package_map(void)
         * primary cores.
         */
        ncpus = boot_cpu_data.x86_max_cores;
+       if (!ncpus) {
+               pr_warn("x86_max_cores == zero !?!?");
+               ncpus = 1;
+       }
+
        __max_logical_packages = DIV_ROUND_UP(total_cpus, ncpus);
 
        /*