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 --- drivers/pps/clients/pps-ktimer.c | 87 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 drivers/pps/clients/pps-ktimer.c (limited to 'drivers/pps/clients/pps-ktimer.c') diff --git a/drivers/pps/clients/pps-ktimer.c b/drivers/pps/clients/pps-ktimer.c new file mode 100644 index 000000000..121bd29d8 --- /dev/null +++ b/drivers/pps/clients/pps-ktimer.c @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * pps-ktimer.c -- kernel timer test client + * + * Copyright (C) 2005-2006 Rodolfo Giometti + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include + +/* + * Global variables + */ + +static struct pps_device *pps; +static struct timer_list ktimer; + +/* + * The kernel timer + */ + +static void pps_ktimer_event(struct timer_list *unused) +{ + struct pps_event_time ts; + + /* First of all we get the time stamp... */ + pps_get_ts(&ts); + + pps_event(pps, &ts, PPS_CAPTUREASSERT, NULL); + + mod_timer(&ktimer, jiffies + HZ); +} + +/* + * The PPS info struct + */ + +static struct pps_source_info pps_ktimer_info = { + .name = "ktimer", + .path = "", + .mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT | + PPS_ECHOASSERT | + PPS_CANWAIT | PPS_TSFMT_TSPEC, + .owner = THIS_MODULE, +}; + +/* + * Module staff + */ + +static void __exit pps_ktimer_exit(void) +{ + dev_dbg(&pps->dev, "ktimer PPS source unregistered\n"); + + timer_delete_sync(&ktimer); + pps_unregister_source(pps); +} + +static int __init pps_ktimer_init(void) +{ + pps = pps_register_source(&pps_ktimer_info, + PPS_CAPTUREASSERT | PPS_OFFSETASSERT); + if (IS_ERR(pps)) { + pr_err("cannot register PPS source\n"); + return PTR_ERR(pps); + } + + timer_setup(&ktimer, pps_ktimer_event, 0); + mod_timer(&ktimer, jiffies + HZ); + + dev_dbg(&pps->dev, "ktimer PPS source registered\n"); + + return 0; +} + +module_init(pps_ktimer_init); +module_exit(pps_ktimer_exit); + +MODULE_AUTHOR("Rodolfo Giometti "); +MODULE_DESCRIPTION("dummy PPS source by using a kernel timer (just for debug)"); +MODULE_LICENSE("GPL"); -- cgit v1.3.1