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[S390] smp: setup smp_processor_id early

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smp_processor_id() is supposed to work before setup_arch() gets called.
Before that smp_processor_id() may return just an arbitrary value that
is contained in the uninitialized boot lowcore.
So provide the arch function which will override the weak function in
init/main.c.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2010-01-13 20:44:34 +01:00 • committed by Martin Schwidefsky
parent a58c26bba9
commit 02beaccc90
2 changed files with 6 additions and 1 deletions
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1
arch/s390/kernel/setup.c
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@ -849,7 +849,6 @@ setup_arch(char **cmdline_p)
setup_lowcore(); setup_lowcore();
cpu_init(); cpu_init();
__cpu_logical_map[0] = stap();
s390_init_cpu_topology(); s390_init_cpu_topology();
/* /*

6
arch/s390/kernel/smp.c
View file

@ -717,6 +717,12 @@ void __init smp_cpus_done(unsigned int max_cpus)
{ {
} }
void __init smp_setup_processor_id(void)
{
S390_lowcore.cpu_nr = 0;
__cpu_logical_map[0] = stap();
}
/* /*
* the frequency of the profiling timer can be changed * the frequency of the profiling timer can be changed
* by writing a multiplier value into /proc/profile. * by writing a multiplier value into /proc/profile.