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[POWERPC] Fix per-cpu allocation on oldworld SMP powermacs 

The per-cpu area(a) for the secondary CPU(s) isn't getting allocated
on old SMP powermacs that don't have the secondary CPU(s) listed in
the device tree, as per-cpu areas are now only allocated for CPUs in
the cpu_possible_map, and we aren't setting the bits for the secondary
CPU(s) until smp_prepare_cpus(), which is after per-cpu allocation.
Therefore this sets the bits for CPUs 1..3 in cpu_possible_map in
pmac_setup_arch, so they get per-cpu data allocated.

Signed-off-by: Paul Mackerras <paulus@samba.org>
hifive-unleashed-5.1
Paul Mackerras 2007-06-07 22:42:19 +10:00
parent eedab661a5
commit c63c4faa8c
2 changed files with 12 additions and 2 deletions
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13
arch/powerpc/platforms/powermac/setup.c
View File

@ -363,8 +363,19 @@ static void __init pmac_setup_arch(void)
smp_ops = &core99_smp_ops;
}
#ifdef CONFIG_PPC32
else
else {
/*
* We have to set bits in cpu_possible_map here since the
* secondary CPU(s) aren't in the device tree, and
* setup_per_cpu_areas only allocates per-cpu data for
* CPUs in the cpu_possible_map.
*/
int cpu;
for (cpu = 1; cpu < 4 && cpu < NR_CPUS; ++cpu)
cpu_set(cpu, cpu_possible_map);
smp_ops = &psurge_smp_ops;
}
#endif
#endif /* CONFIG_SMP */

1
arch/powerpc/platforms/powermac/smp.c
View File

@ -317,7 +317,6 @@ static int __init smp_psurge_probe(void)
ncpus = NR_CPUS;
for (i = 1; i < ncpus ; ++i) {
cpu_set(i, cpu_present_map);
cpu_set(i, cpu_possible_map);
set_hard_smp_processor_id(i, i);
}