nr_cpu_ids is going to become a constant under some configs, so don't assign it. Currently only x86 seems to anyway. From: Rusty Russell Signed-off-by: Rusty Russell Signed-off-by: Mike Travis --- arch/x86/kernel/smpboot.c | 4 ++-- include/linux/cpumask.h | 4 ++++ init/main.c | 4 ++-- 3 files changed, 8 insertions(+), 4 deletions(-) --- linux-2.6.28.orig/arch/x86/kernel/smpboot.c +++ linux-2.6.28/arch/x86/kernel/smpboot.c @@ -1079,7 +1079,7 @@ static int __init smp_sanity_check(unsig nr++; } - nr_cpu_ids = 8; + setup_nr_cpu_ids(); } #endif @@ -1296,7 +1296,7 @@ __init void prefill_possible_map(void) for (i = 0; i < possible; i++) cpu_set(i, cpu_possible_map); - nr_cpu_ids = possible; + setup_nr_cpu_ids(); } #ifdef CONFIG_HOTPLUG_CPU --- linux-2.6.28.orig/include/linux/cpumask.h +++ linux-2.6.28/include/linux/cpumask.h @@ -144,6 +144,7 @@ #include #include #include +#include struct cpumask { @@ -636,4 +637,7 @@ extern cpumask_t cpu_active_map; #define for_each_online_cpu(cpu) for_each_cpu_mask_nr((cpu), cpu_online_map) #define for_each_present_cpu(cpu) for_each_cpu_mask_nr((cpu), cpu_present_map) +/* Arch-specific code may call this to initialize nr_cpu_ids based on + * the cpu_possible_map. */ +void __init setup_nr_cpu_ids(void); #endif /* __LINUX_CPUMASK_H */ --- linux-2.6.28.orig/init/main.c +++ linux-2.6.28/init/main.c @@ -362,7 +362,7 @@ static void __init smp_init(void) #endif static inline void setup_per_cpu_areas(void) { } -static inline void setup_nr_cpu_ids(void) { } +void __init setup_nr_cpu_ids(void) { } static inline void smp_prepare_cpus(unsigned int maxcpus) { } #else @@ -377,7 +377,7 @@ int nr_cpu_ids __read_mostly = NR_CPUS; EXPORT_SYMBOL(nr_cpu_ids); /* An arch may set nr_cpu_ids earlier if needed, so this would be redundant */ -static void __init setup_nr_cpu_ids(void) +void __init setup_nr_cpu_ids(void) { int cpu, highest_cpu = 0; -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/