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authorMichael Holzheu <holzheu@linux.vnet.ibm.com>2015-08-01 18:12:41 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-08-07 09:56:58 +0200
commit3a3814c28b13d038ce5e055fc01f9a7aa5b821b9 (patch)
tree23377b9d15e9996fcd0a4ab45dd663a035345a2f /arch/s390/numa
parentf341b8dff9823a969be5fb3c958e5cb305ac67e8 (diff)
s390/topology: remove topology lock
Since we are already protected by the "sched_domains_mutex" lock, we can safely remove the topology lock. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/numa')
-rw-r--r--arch/s390/numa/mode_emu.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/s390/numa/mode_emu.c b/arch/s390/numa/mode_emu.c
index 9d4e1e15a6f0..646cd94cff2f 100644
--- a/arch/s390/numa/mode_emu.c
+++ b/arch/s390/numa/mode_emu.c
@@ -51,6 +51,11 @@ enum {TOPTREE_ID_PHYS, TOPTREE_ID_NUMA};
static int emu_nodes = 1;
/* NUMA stripe size */
static unsigned long emu_size;
+
+/*
+ * Node to core pinning information updates are protected by
+ * "sched_domains_mutex".
+ */
/* Pinned core to node mapping */
static int cores_to_node_id[CONFIG_NR_CPUS];
/* Total number of pinned cores */
@@ -393,7 +398,7 @@ static void print_node_to_core_map(void)
* Transfer physical topology into a NUMA topology and modify CPU masks
* according to the NUMA topology.
*
- * This function is called under the CPU hotplug lock.
+ * Must be called with "sched_domains_mutex" lock held.
*/
static void emu_update_cpu_topology(void)
{