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[PATCH] add smp_setup_processor_id()

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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>
This commit is contained in:
Andrew Morton 2006-06-30 01:55:50 -07:00 committed by Linus Torvalds
parent a1836a42da
commit 033ab7f8e5
3 changed files with 15 additions and 0 deletions
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6
arch/i386/mach-voyager/voyager_smp.c
View 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();
}

2
include/linux/smp.h
View 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 */

7
init/main.c
View 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