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sched/isolation, watchdog: Use housekeeping_cpumask() instead of ad-hoc version

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While trying to disable the watchog on nohz_full CPUs, the watchdog
implements an ad-hoc version of housekeeping_cpumask(). Lets replace
those re-invented lines.

Signed-off-by: Frederic Weisbecker <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Luiz Capitulino <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Wanpeng Li <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Frederic Weisbecker 2017-10-27 04:42:29 +02:00 • committed by Ingo Molnar
commit 13316b31fd
1 changed files with 3 additions and 8 deletions
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11
kernel/watchdog.c
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@ -774,15 +774,10 @@ int proc_watchdog_cpumask(struct ctl_table *table, int write,
void __init lockup_detector_init(void)
{
#ifdef CONFIG_NO_HZ_FULL
if (tick_nohz_full_enabled()) {
if (tick_nohz_full_enabled())
pr_info("Disabling watchdog on nohz_full cores by default\n");
cpumask_copy(&watchdog_cpumask, housekeeping_mask);
} else
cpumask_copy(&watchdog_cpumask, cpu_possible_mask);
#else
cpumask_copy(&watchdog_cpumask, cpu_possible_mask);
#endif
cpumask_copy(&watchdog_cpumask, housekeeping_cpumask());
if (!watchdog_nmi_probe())
nmi_watchdog_available = true;