aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/platforms/cell/smp.c
diff options
context:
space:
mode:
authorMilton Miller <miltonm@bga.com>2008-10-20 15:37:03 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-10-21 15:19:12 +1100
commit6a75a6b8e85e92cc774d42a4e113c76c30b5a539 (patch)
treecd6b0655ba24655fb3bbdf58601099754a9bf232 /arch/powerpc/platforms/cell/smp.c
parented7b2144bcc87b2b097553f15a2f96e18ede21b0 (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.c10
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 {