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smpboot: allow passing the cpumask on per-cpu thread registration

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It makes the registration cheaper and simpler for the smpboot per-cpu
kthread users that don't need to always update the cpumask after threads
creation.

[sfr@canb.auug.org.au: fix for allow passing the cpumask on per-cpu thread registration]
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: Chris Metcalf <cmetcalf@ezchip.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Frederic Weisbecker 2015-09-04 15:45:06 -07:00 • committed by Linus Torvalds
parent 3dd08c0c91
commit 230ec93909
3 changed files with 22 additions and 12 deletions
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9
kernel/watchdog.c
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@ -713,15 +713,12 @@ static int watchdog_enable_all_cpus(void)
int err = 0;
if (!watchdog_running) {
err = smpboot_register_percpu_thread(&watchdog_threads);
err = smpboot_register_percpu_thread_cpumask(&watchdog_threads,
&watchdog_cpumask);
if (err)
pr_err("Failed to create watchdog threads, disabled\n");
else {
if (smpboot_update_cpumask_percpu_thread(
&watchdog_threads, &watchdog_cpumask))
pr_err("Failed to set cpumask for watchdog threads\n");
else
watchdog_running = 1;
}
} else {
/*
* Enable/disable the lockup detectors or