From: Andrew Morton Presently, smp_processor_id() isn't necessarily set up until setup_arch(). But it's used in boot_cpu_init() and printk() and perhaps in other places, prior to setup_arch() being called. So provide a new smp_setup_processor_id() which is called before anything else, wire it up for Voyager (which boots on a CPU other than #0, and broke). Cc: James Bottomley Signed-off-by: Andrew Morton --- arch/i386/mach-voyager/voyager_smp.c | 6 ++++++ include/linux/smp.h | 2 ++ init/main.c | 7 +++++++ 3 files changed, 15 insertions(+) diff -puN init/main.c~add-smp_setup_processor_id init/main.c --- a/init/main.c~add-smp_setup_processor_id +++ a/init/main.c @@ -455,10 +455,17 @@ static void __init boot_cpu_init(void) cpu_set(cpu, cpu_possible_map); } +void __init __attribute__((weak)) smp_setup_processor_id(void) +{ +} + asmlinkage void __init start_kernel(void) { char * command_line; extern struct kernel_param __start___param[], __stop___param[]; + + smp_setup_processor_id(); + /* * Interrupts are still disabled. Do necessary setups, then * enable them diff -puN arch/i386/mach-voyager/voyager_smp.c~add-smp_setup_processor_id arch/i386/mach-voyager/voyager_smp.c --- a/arch/i386/mach-voyager/voyager_smp.c~add-smp_setup_processor_id +++ a/arch/i386/mach-voyager/voyager_smp.c @@ -1938,3 +1938,9 @@ smp_cpus_done(unsigned int max_cpus) { zap_low_mappings(); } + +void __init +smp_setup_processor_id(void) +{ + current_thread_info()->cpu = hard_smp_processor_id(); +} diff -puN include/linux/smp.h~add-smp_setup_processor_id include/linux/smp.h --- a/include/linux/smp.h~add-smp_setup_processor_id +++ a/include/linux/smp.h @@ -125,4 +125,6 @@ static inline void smp_send_reschedule(i #define put_cpu() preempt_enable() #define put_cpu_no_resched() preempt_enable_no_resched() +void smp_setup_processor_id(void); + #endif /* __LINUX_SMP_H */ _