From a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Wed, 5 Aug 2026 07:52:36 -0700 Subject: workqueue: skip the node_nr_active update for non-unbound workqueues 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 Signed-off-by: Tejun Heo --- tools/perf/perf-read-vdso.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 tools/perf/perf-read-vdso.c (limited to 'tools/perf/perf-read-vdso.c') diff --git a/tools/perf/perf-read-vdso.c b/tools/perf/perf-read-vdso.c new file mode 100644 index 000000000..aaa5210ea --- /dev/null +++ b/tools/perf/perf-read-vdso.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include + +#define VDSO__MAP_NAME "[vdso]" + +/* + * Include definition of find_map() also used in util/vdso.c for + * building perf. + */ +#include "util/find-map.c" + +int main(void) +{ + void *start, *end; + size_t size, written; + + if (find_map(&start, &end, VDSO__MAP_NAME)) + return 1; + + size = end - start; + + while (size) { + written = fwrite(start, 1, size, stdout); + if (!written) + return 1; + start += written; + size -= written; + } + + if (fflush(stdout)) + return 1; + + return 0; +} -- cgit v1.3.1