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 --- samples/watchdog/.gitignore | 2 ++ samples/watchdog/Makefile | 2 ++ samples/watchdog/watchdog-simple.c | 25 +++++++++++++++++++++++++ 3 files changed, 29 insertions(+) create mode 100644 samples/watchdog/.gitignore create mode 100644 samples/watchdog/Makefile create mode 100644 samples/watchdog/watchdog-simple.c (limited to 'samples/watchdog') diff --git a/samples/watchdog/.gitignore b/samples/watchdog/.gitignore new file mode 100644 index 000000000..a70a0150e --- /dev/null +++ b/samples/watchdog/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +/watchdog-simple diff --git a/samples/watchdog/Makefile b/samples/watchdog/Makefile new file mode 100644 index 000000000..ab39d23dc --- /dev/null +++ b/samples/watchdog/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +userprogs-always-y += watchdog-simple diff --git a/samples/watchdog/watchdog-simple.c b/samples/watchdog/watchdog-simple.c new file mode 100644 index 000000000..9ce66d2ca --- /dev/null +++ b/samples/watchdog/watchdog-simple.c @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include + +int main(void) +{ + int fd = open("/dev/watchdog", O_WRONLY); + int ret = 0; + if (fd == -1) { + perror("watchdog"); + exit(EXIT_FAILURE); + } + while (1) { + ret = write(fd, "\0", 1); + if (ret != 1) { + ret = -1; + break; + } + sleep(10); + } + close(fd); + return ret; +} -- cgit v1.3.1