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authorLinus Torvalds <torvalds@linux-foundation.org>2022-04-30 10:24:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-04-30 10:24:21 -0700
commit57ae8a492116910bad2b3497ffe555b3a4b4180f (patch)
tree225c3ec40adc582f89ff62450e842fa9d835f015 /drivers
parente2e5ebecca69a5a692cbd0728cb7f4abd25f48ac (diff)
parentad8d869343ae4a07a2038a4ca923f699308c8323 (diff)
downloadlinux-57ae8a492116910bad2b3497ffe555b3a4b4180f.tar.bz2
Merge tag 'driver-core-5.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH: "Here are some small driver core and kernfs fixes for some reported problems. They include: - kernfs regression that is causing oopses in 5.17 and newer releases - topology sysfs fixes for a few small reported problems. All of these have been in linux-next for a while with no reported issues" * tag 'driver-core-5.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: kernfs: fix NULL dereferencing in kernfs_remove topology: Fix up build warning in topology_is_visible() arch_topology: Do not set llc_sibling if llc_id is invalid topology: make core_mask include at least cluster_siblings topology/sysfs: Hide PPIN on systems that do not support it.
Diffstat (limited to 'drivers')
-rw-r--r--drivers/base/arch_topology.c11
-rw-r--r--drivers/base/topology.c10
2 files changed, 20 insertions, 1 deletions
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 1d6636ebaac5..f73b836047cf 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -667,6 +667,15 @@ const struct cpumask *cpu_coregroup_mask(int cpu)
core_mask = &cpu_topology[cpu].llc_sibling;
}
+ /*
+ * For systems with no shared cpu-side LLC but with clusters defined,
+ * extend core_mask to cluster_siblings. The sched domain builder will
+ * then remove MC as redundant with CLS if SCHED_CLUSTER is enabled.
+ */
+ if (IS_ENABLED(CONFIG_SCHED_CLUSTER) &&
+ cpumask_subset(core_mask, &cpu_topology[cpu].cluster_sibling))
+ core_mask = &cpu_topology[cpu].cluster_sibling;
+
return core_mask;
}
@@ -684,7 +693,7 @@ void update_siblings_masks(unsigned int cpuid)
for_each_online_cpu(cpu) {
cpu_topo = &cpu_topology[cpu];
- if (cpuid_topo->llc_id == cpu_topo->llc_id) {
+ if (cpu_topo->llc_id != -1 && cpuid_topo->llc_id == cpu_topo->llc_id) {
cpumask_set_cpu(cpu, &cpuid_topo->llc_sibling);
cpumask_set_cpu(cpuid, &cpu_topo->llc_sibling);
}
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index e9d1efcda89b..ac6ad9ab67f9 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -152,9 +152,19 @@ static struct attribute *default_attrs[] = {
NULL
};
+static umode_t topology_is_visible(struct kobject *kobj,
+ struct attribute *attr, int unused)
+{
+ if (attr == &dev_attr_ppin.attr && !topology_ppin(kobj_to_dev(kobj)->id))
+ return 0;
+
+ return attr->mode;
+}
+
static const struct attribute_group topology_attr_group = {
.attrs = default_attrs,
.bin_attrs = bin_attrs,
+ .is_visible = topology_is_visible,
.name = "topology"
};