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, 32 insertions, 0 deletions

diff --git a/tools/perf/util/unwind-libdw.h b/tools/perf/util/unwind-libdw.h
new file mode 100644
index 000000000..6423bf5a2
--- /dev/null
+++ b/tools/perf/util/unwind-libdw.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_UNWIND_LIBDW_H
+#define __PERF_UNWIND_LIBDW_H
+
+#include <stdint.h>
+#include "unwind.h"
+
+struct machine;
+struct perf_sample;
+struct thread;
+
+#ifdef HAVE_LIBDW_SUPPORT
+
+struct unwind_info {
+	void			*dwfl;
+	struct perf_sample      *sample;
+	struct machine          *machine;
+	struct thread           *thread;
+	unwind_entry_cb_t	cb;
+	void			*arg;
+	int			max_stack;
+	int			idx;
+	uint32_t		e_flags;
+	uint16_t		e_machine;
+	bool			best_effort;
+	struct unwind_entry	entries[];
+};
+
+void libdw__invalidate_dwfl(struct maps *maps, void *dwfl);
+#endif
+
+#endif /* __PERF_UNWIND_LIBDW_H */