mirror of
https://github.com/torvalds/linux
synced 2024-09-06 18:01:05 +00:00
watchdog/core: Split out cpumask write function
Split the write part of the cpumask proc handler out into a separate helper to avoid deep indentation. This also reduces the patch complexity in the following cleanups. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Don Zickus <dzickus@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Ulrich Obergfell <uobergfe@redhat.com> Link: http://lkml.kernel.org/r/20170912194147.218075991@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
parent
368a7e2ce8
commit
05ba3de74a
|
@ -792,10 +792,29 @@ static int watchdog_update_cpus(void)
|
|||
if (IS_ENABLED(CONFIG_SOFTLOCKUP_DETECTOR)) {
|
||||
return smpboot_update_cpumask_percpu_thread(&watchdog_threads,
|
||||
&watchdog_cpumask);
|
||||
__lockup_detector_cleanup();
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void proc_watchdog_cpumask_update(void)
|
||||
{
|
||||
/* Remove impossible cpus to keep sysctl output clean. */
|
||||
cpumask_and(&watchdog_cpumask, &watchdog_cpumask, cpu_possible_mask);
|
||||
|
||||
if (watchdog_running) {
|
||||
/*
|
||||
* Failure would be due to being unable to allocate a
|
||||
* temporary cpumask, so we are likely not in a position to
|
||||
* do much else to make things better.
|
||||
*/
|
||||
if (watchdog_update_cpus() != 0)
|
||||
pr_err("cpumask update failed\n");
|
||||
}
|
||||
|
||||
watchdog_nmi_reconfigure();
|
||||
}
|
||||
|
||||
/*
|
||||
* The cpumask is the mask of possible cpus that the watchdog can run
|
||||
* on, not the mask of cpus it is actually running on. This allows the
|
||||
|
@ -811,30 +830,13 @@ int proc_watchdog_cpumask(struct ctl_table *table, int write,
|
|||
mutex_lock(&watchdog_mutex);
|
||||
|
||||
err = proc_do_large_bitmap(table, write, buffer, lenp, ppos);
|
||||
if (!err && write) {
|
||||
/* Remove impossible cpus to keep sysctl output cleaner. */
|
||||
cpumask_and(&watchdog_cpumask, &watchdog_cpumask,
|
||||
cpu_possible_mask);
|
||||
|
||||
if (watchdog_running) {
|
||||
/*
|
||||
* Failure would be due to being unable to allocate
|
||||
* a temporary cpumask, so we are likely not in a
|
||||
* position to do much else to make things better.
|
||||
*/
|
||||
if (watchdog_update_cpus() != 0)
|
||||
pr_err("cpumask update failed\n");
|
||||
}
|
||||
|
||||
watchdog_nmi_reconfigure();
|
||||
__lockup_detector_cleanup();
|
||||
}
|
||||
if (!err && write)
|
||||
proc_watchdog_cpumask_update();
|
||||
|
||||
mutex_unlock(&watchdog_mutex);
|
||||
cpu_hotplug_enable();
|
||||
return err;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_SYSCTL */
|
||||
|
||||
void __init lockup_detector_init(void)
|
||||
|
|
Loading…
Reference in a new issue