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| author | Jesse Larrew <jlarrew@linux.vnet.ibm.com> | 2012-06-07 16:04:34 -0500 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-09-05 16:05:19 +1000 |
| commit | 79c5fcebfe4021f326a6715009f0b6b622d5df92 (patch) | |
| tree | 7ebf15489330161ab74aba15d43bee3f17edc3ce /arch | |
| parent | 5b716ac728bcc01b1f2a7ed6e437196602237c27 (diff) | |
| download | lwn-79c5fcebfe4021f326a6715009f0b6b622d5df92.tar.gz lwn-79c5fcebfe4021f326a6715009f0b6b622d5df92.zip | |
powerpc/vphn: Fix arch_update_cpu_topology() return value
arch_update_cpu_topology() should only return 1 when the topology has
actually changed, and should return 0 otherwise.
This patch fixes a potential bug where rebuild_sched_domains() would
reinitialize the sched domains even when the topology hasn't changed.
Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/numa.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 39b159751c35..59213cfaeca9 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -1436,11 +1436,11 @@ static long vphn_get_associativity(unsigned long cpu, /* * Update the node maps and sysfs entries for each cpu whose home node - * has changed. + * has changed. Returns 1 when the topology has changed, and 0 otherwise. */ int arch_update_cpu_topology(void) { - int cpu, nid, old_nid; + int cpu, nid, old_nid, changed = 0; unsigned int associativity[VPHN_ASSOC_BUFSIZE] = {0}; struct device *dev; @@ -1466,9 +1466,10 @@ int arch_update_cpu_topology(void) dev = get_cpu_device(cpu); if (dev) kobject_uevent(&dev->kobj, KOBJ_CHANGE); + changed = 1; } - return 1; + return changed; } static void topology_work_fn(struct work_struct *work) |