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| author | Nathan Fontenot <nfont@linux.vnet.ibm.com> | 2013-06-24 22:08:05 -0500 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-07-01 11:49:34 +1000 |
| commit | dd023217e17e72b46fb4d49c7734c426938c3dba (patch) | |
| tree | ab68156166d38800f77502f7bbbc6ba4aa73578b /arch/powerpc | |
| parent | ec207dcc91c62aeccb65b36c7764076f5e5aaddb (diff) | |
| download | linux-0-day-dd023217e17e72b46fb4d49c7734c426938c3dba.tar.gz linux-0-day-dd023217e17e72b46fb4d49c7734c426938c3dba.tar.xz | |
powerpc/numa: Do not update sysfs cpu registration from invalid context
The topology update code that updates the cpu node registration in sysfs
should not be called while in stop_machine(). The register/unregister
calls take a lock and may sleep.
This patch moves these calls outside of the call to stop_machine().
Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/mm/numa.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index c792cd95e792e..08397217e8ace 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -1432,11 +1432,9 @@ static int update_cpu_topology(void *data) if (cpu != update->cpu) continue; - unregister_cpu_under_node(update->cpu, update->old_nid); unmap_cpu_from_node(update->cpu); map_cpu_to_node(update->cpu, update->new_nid); vdso_getcpu_init(); - register_cpu_under_node(update->cpu, update->new_nid); } return 0; @@ -1484,6 +1482,9 @@ int arch_update_cpu_topology(void) stop_machine(update_cpu_topology, &updates[0], &updated_cpus); for (ud = &updates[0]; ud; ud = ud->next) { + unregister_cpu_under_node(ud->cpu, ud->old_nid); + register_cpu_under_node(ud->cpu, ud->new_nid); + dev = get_cpu_device(ud->cpu); if (dev) kobject_uevent(&dev->kobj, KOBJ_CHANGE); |