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| author | Paul Mackerras <paulus@samba.org> | 2007-06-07 22:42:19 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-06-14 11:56:17 +1000 |
| commit | c63c4faa8cf055319c7ed557d2050c1c3776fac5 (patch) | |
| tree | ed0515562cfa6e46a69cc035e53c7cee82654b0d /arch/powerpc | |
| parent | eedab661a51966c454e38c17266a531aa58b4a98 (diff) | |
| download | linux-c63c4faa8cf055319c7ed557d2050c1c3776fac5.tar.gz linux-c63c4faa8cf055319c7ed557d2050c1c3776fac5.tar.bz2 linux-c63c4faa8cf055319c7ed557d2050c1c3776fac5.zip | |
[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>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/powermac/setup.c | 13 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powermac/smp.c | 1 |
2 files changed, 12 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c index 07b1c4ec428d..956571526a57 100644 --- a/arch/powerpc/platforms/powermac/setup.c +++ b/arch/powerpc/platforms/powermac/setup.c @@ -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 */ diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c index 686ed82bde79..cb2d894541c6 100644 --- a/arch/powerpc/platforms/powermac/smp.c +++ b/arch/powerpc/platforms/powermac/smp.c @@ -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); } |