diff options
| author | Milton Miller <miltonm@bga.com> | 2008-10-20 15:37:03 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-10-21 15:19:12 +1100 |
| commit | 6a75a6b8e85e92cc774d42a4e113c76c30b5a539 (patch) | |
| tree | cd6b0655ba24655fb3bbdf58601099754a9bf232 /arch/powerpc/platforms/cell/smp.c | |
| parent | ed7b2144bcc87b2b097553f15a2f96e18ede21b0 (diff) | |
powerpc: Use cpu_thread_in_core in smp_init for of_spin_map
We used to assume that even numbered threads were the primary
threads, ie those that would be listed and started as a cpu from
open firmware. Replace a left over is even (% 2) check with a check
for it being a primary thread and update the comments.
Tested with a debug print on pseries, identical code found for cell.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/smp.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/smp.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/arch/powerpc/platforms/cell/smp.c b/arch/powerpc/platforms/cell/smp.c index efb3964457b..c0d86e1f56e 100644 --- a/arch/powerpc/platforms/cell/smp.c +++ b/arch/powerpc/platforms/cell/smp.c @@ -54,8 +54,8 @@ #endif /* - * The primary thread of each non-boot processor is recorded here before - * smp init. + * The Primary thread of each non-boot processor was started from the OF client + * interface by prom_hold_cpus and is spinning on secondary_hold_spinloop. */ static cpumask_t of_spin_map; @@ -208,11 +208,7 @@ void __init smp_init_cell(void) /* Mark threads which are still spinning in hold loops. */ if (cpu_has_feature(CPU_FTR_SMT)) { for_each_present_cpu(i) { - if (i % 2 == 0) - /* - * Even-numbered logical cpus correspond to - * primary threads. - */ + if (cpu_thread_in_core(i) == 0) cpu_set(i, of_spin_map); } } else { |