sched/isolation: Make the housekeeping cpumask private

Nobody needs to access this detail. housekeeping_cpumask() already
takes care of it.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Wanpeng Li <kernellwp@gmail.com>
Link: http://lkml.kernel.org/r/1509072159-31808-5-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 35 insertions, 1 deletions

diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c
index 3589252ed476..16445097eb25 100644
--- a/kernel/sched/isolation.c
+++ b/kernel/sched/isolation.c
@@ -11,7 +11,41 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 
-cpumask_var_t housekeeping_mask;
+static cpumask_var_t housekeeping_mask;
+
+int housekeeping_any_cpu(void)
+{
+        if (tick_nohz_full_enabled())
+                return cpumask_any_and(housekeeping_mask, cpu_online_mask);
+
+        return smp_processor_id();
+}
+EXPORT_SYMBOL_GPL(housekeeping_any_cpu);
+
+const struct cpumask *housekeeping_cpumask(void)
+{
+        if (tick_nohz_full_enabled())
+                return housekeeping_mask;
+
+        return cpu_possible_mask;
+}
+EXPORT_SYMBOL_GPL(housekeeping_cpumask);
+
+void housekeeping_affine(struct task_struct *t)
+{
+        if (tick_nohz_full_enabled())
+                set_cpus_allowed_ptr(t, housekeeping_mask);
+}
+EXPORT_SYMBOL_GPL(housekeeping_affine);
+
+bool housekeeping_test_cpu(int cpu)
+{
+        if (tick_nohz_full_enabled())
+                return cpumask_test_cpu(cpu, housekeeping_mask);
+
+        return true;
+}
+EXPORT_SYMBOL_GPL(housekeeping_test_cpu);
 
 void __init housekeeping_init(void)
 {