diff options
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/topology.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c index 0f5f8b09c903..1fbe1f83f89c 100644 --- a/arch/s390/kernel/topology.c +++ b/arch/s390/kernel/topology.c @@ -40,8 +40,10 @@ static struct sysinfo_15_1_x *tl_info; static int topology_enabled = 1; static DECLARE_WORK(topology_work, topology_work_fn); -/* topology_lock protects the socket and book linked lists */ -static DEFINE_SPINLOCK(topology_lock); +/* + * Socket/Book linked lists and per_cpu(cpu_topology) updates are + * protected by "sched_domains_mutex". + */ static struct mask_info socket_info; static struct mask_info book_info; @@ -191,7 +193,6 @@ static void tl_to_masks(struct sysinfo_15_1_x *info) { struct cpuid cpu_id; - spin_lock_irq(&topology_lock); get_cpu_id(&cpu_id); clear_masks(); switch (cpu_id.machine) { @@ -202,7 +203,6 @@ static void tl_to_masks(struct sysinfo_15_1_x *info) default: __tl_to_masks_generic(info); } - spin_unlock_irq(&topology_lock); } static void topology_update_polarization_simple(void) @@ -247,10 +247,8 @@ int topology_set_cpu_management(int fc) static void update_cpu_masks(void) { - unsigned long flags; int cpu; - spin_lock_irqsave(&topology_lock, flags); for_each_possible_cpu(cpu) { per_cpu(cpu_topology, cpu).thread_mask = cpu_thread_map(cpu); per_cpu(cpu_topology, cpu).core_mask = cpu_group_map(&socket_info, cpu); @@ -262,7 +260,6 @@ static void update_cpu_masks(void) per_cpu(cpu_topology, cpu).book_id = cpu; } } - spin_unlock_irqrestore(&topology_lock, flags); numa_update_cpu_topology(); } |