linux-kernel - [tip:sched/core] housekeeping: Make housekeeping cpumask private

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Date:   Tue, 24 Oct 2017 07:50:31 -0700
From:   tip-bot for Frederic Weisbecker <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, torvalds@...ux-foundation.org, hpa@...or.com,
        mingo@...nel.org, lcapitulino@...hat.com, peterz@...radead.org,
        kernellwp@...il.com, cmetcalf@...lanox.com, frederic@...nel.org,
        riel@...hat.com, linux-kernel@...r.kernel.org, cl@...ux.com,
        paulmck@...ux.vnet.ibm.com, efault@....de
Subject: [tip:sched/core] housekeeping: Make housekeeping cpumask private

Commit-ID:  9ff138bdbcf1175c138c7f89a9daa918b51bc33a
Gitweb:     https://git.kernel.org/tip/9ff138bdbcf1175c138c7f89a9daa918b51bc33a
Author:     Frederic Weisbecker <frederic@...nel.org>
AuthorDate: Tue, 24 Oct 2017 15:06:53 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 24 Oct 2017 15:20:14 +0200

housekeeping: Make housekeeping cpumask private

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

Signed-off-by: Frederic Weisbecker <frederic@...nel.org>
Cc: Chris Metcalf <cmetcalf@...lanox.com>
Cc: Christoph Lameter <cl@...ux.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Luiz Capitulino <lcapitulino@...hat.com>
Cc: Mike Galbraith <efault@....de>
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rik van Riel <riel@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Wanpeng Li <kernellwp@...il.com>
Link: http://lkml.kernel.org/r/1508850421-10058-5-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 include/linux/housekeeping.h | 31 ++++++++++---------------------
 kernel/housekeeping.c        | 33 ++++++++++++++++++++++++++++++++-
 2 files changed, 42 insertions(+), 22 deletions(-)

diff --git a/include/linux/housekeeping.h b/include/linux/housekeeping.h
index 64d0ee5..31a1401 100644
--- a/include/linux/housekeeping.h
+++ b/include/linux/housekeeping.h
@@ -6,46 +6,35 @@
 #include <linux/tick.h>
 
 #ifdef CONFIG_NO_HZ_FULL
-extern cpumask_var_t housekeeping_mask;
+extern int housekeeping_any_cpu(void);
+extern const struct cpumask *housekeeping_cpumask(void);
+extern void housekeeping_affine(struct task_struct *t);
+extern bool housekeeping_test_cpu(int cpu);
 extern void __init housekeeping_init(void);
+
 #else
-static inline void housekeeping_init(void) { }
-#endif /* CONFIG_NO_HZ_FULL */
 
 static inline int housekeeping_any_cpu(void)
 {
-#ifdef CONFIG_NO_HZ_FULL
-	if (tick_nohz_full_enabled())
-		return cpumask_any_and(housekeeping_mask, cpu_online_mask);
-#endif
 	return smp_processor_id();
 }
 
 static inline const struct cpumask *housekeeping_cpumask(void)
 {
-#ifdef CONFIG_NO_HZ_FULL
-	if (tick_nohz_full_enabled())
-		return housekeeping_mask;
-#endif
 	return cpu_possible_mask;
 }
 
+static inline void housekeeping_affine(struct task_struct *t) { }
+static inline void housekeeping_init(void) { }
+#endif /* CONFIG_NO_HZ_FULL */
+
 static inline bool is_housekeeping_cpu(int cpu)
 {
 #ifdef CONFIG_NO_HZ_FULL
 	if (tick_nohz_full_enabled())
-		return cpumask_test_cpu(cpu, housekeeping_mask);
+		return housekeeping_test_cpu(cpu);
 #endif
 	return true;
 }
 
-static inline void housekeeping_affine(struct task_struct *t)
-{
-#ifdef CONFIG_NO_HZ_FULL
-	if (tick_nohz_full_enabled())
-		set_cpus_allowed_ptr(t, housekeeping_mask);
-
-#endif
-}
-
 #endif /* _LINUX_HOUSEKEEPING_H */
diff --git a/kernel/housekeeping.c b/kernel/housekeeping.c
index b41c52e..0e70dc8 100644
--- a/kernel/housekeeping.c
+++ b/kernel/housekeeping.c
@@ -11,7 +11,38 @@
 #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();
+}
+
+const struct cpumask *housekeeping_cpumask(void)
+{
+	if (tick_nohz_full_enabled())
+		return housekeeping_mask;
+
+	return cpu_possible_mask;
+}
+
+void housekeeping_affine(struct task_struct *t)
+{
+	if (tick_nohz_full_enabled())
+		set_cpus_allowed_ptr(t, housekeeping_mask);
+}
+
+bool housekeeping_test_cpu(int cpu)
+{
+	if (tick_nohz_full_enabled())
+		return cpumask_test_cpu(cpu, housekeeping_mask);
+
+	return true;
+}
+
 
 void __init housekeeping_init(void)
 {