[PATCH] add smp_setup_processor_id()
Andrew Morton [Fri, 30 Jun 2006 08:55:50 +0000 (01:55 -0700)]
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 <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/mach-voyager/voyager_smp.c
include/linux/smp.h
init/main.c

index 5b8b579..6e9e494 100644 (file)
@@ -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();
+}
index c93c3fe..837e8bc 100644 (file)
@@ -125,4 +125,6 @@ static inline void smp_send_reschedule(int cpu) { }
 #define put_cpu()              preempt_enable()
 #define put_cpu_no_resched()   preempt_enable_no_resched()
 
+void smp_setup_processor_id(void);
+
 #endif /* __LINUX_SMP_H */
index bce0eb7..ae04eb7 100644 (file)
@@ -446,10 +446,17 @@ 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