workqueue: skip the node_nr_active update for non-unbound workqueuesgrafted

apply_wqattrs_commit() updates node_nr_active->max unconditionally.
wq->node_nr_active[] is only allocated for unbound workqueues, so guard
the call before per-cpu workqueues start using this path.

No functional change: only unbound workqueues reach apply_wqattrs_*()
today.

Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/tools/perf/util/mem-info.c b/tools/perf/util/mem-info.c
new file mode 100644
index 000000000..d3efa9c13
--- /dev/null
+++ b/tools/perf/util/mem-info.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/zalloc.h>
+#include "mem-info.h"
+
+struct mem_info *mem_info__get(struct mem_info *mi)
+{
+	struct mem_info *result;
+
+	if (RC_CHK_GET(result, mi))
+		refcount_inc(mem_info__refcnt(mi));
+
+	return result;
+}
+
+void mem_info__put(struct mem_info *mi)
+{
+	if (mi && refcount_dec_and_test(mem_info__refcnt(mi))) {
+		addr_map_symbol__exit(mem_info__iaddr(mi));
+		addr_map_symbol__exit(mem_info__daddr(mi));
+		RC_CHK_FREE(mi);
+	} else {
+		RC_CHK_PUT(mi);
+	}
+}
+
+struct mem_info *mem_info__new(void)
+{
+	struct mem_info *result = NULL;
+	RC_STRUCT(mem_info) *mi = zalloc(sizeof(*mi));
+
+	if (ADD_RC_CHK(result, mi))
+		refcount_set(mem_info__refcnt(result), 1);
+
+	return result;
+}
+
+struct mem_info *mem_info__clone(struct mem_info *mi)
+{
+	struct mem_info *result = mem_info__new();
+
+	if (result) {
+		addr_map_symbol__copy(mem_info__iaddr(result), mem_info__iaddr(mi));
+		addr_map_symbol__copy(mem_info__daddr(result), mem_info__daddr(mi));
+		mem_info__data_src(result)->val = mem_info__data_src(mi)->val;
+	}
+
+	return result;
+}