linux-kernel - [PATCH tip/core/rcu 51/88] rcu: Move expediting-related access/control out of rcupdate.h

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Message-Id: <1495749601-21574-51-git-send-email-paulmck@linux.vnet.ibm.com>
Date:   Thu, 25 May 2017 14:59:24 -0700
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, bobby.prani@...il.com,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 51/88] rcu: Move expediting-related access/control out of rcupdate.h

The rcu_gp_is_normal(), rcu_gp_is_expedited(), rcu_expedite_gp(), and
rcu_unexpedite_gp() functions are intended only for use within the
RCU implementation itself -- the sysfs access is what should be used
outside of RCU.  This commit therefore moves the declarations for
these functions to kernel/rcu/rcu.h, and also includes this file into
kernel/rcu/rcutorture.c and kernel/rcu/rcuperf.c.  This also has the
beneficial effect of shrinking rcupdate.c a bit.

Reported-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
 include/linux/rcupdate.h | 26 --------------------------
 kernel/rcu/rcu.h         | 26 ++++++++++++++++++++++++++
 kernel/rcu/rcuperf.c     |  2 ++
 kernel/rcu/rcutorture.c  |  2 ++
 4 files changed, 30 insertions(+), 26 deletions(-)

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 6e7e930c1610..049c62c59f1b 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -46,32 +46,6 @@
 #include <linux/ktime.h>
 #include <linux/irqflags.h>
 
-#ifdef CONFIG_TINY_RCU
-/* Tiny RCU doesn't expedite, as its purpose in life is instead to be tiny. */
-static inline bool rcu_gp_is_normal(void)  /* Internal RCU use. */
-{
-	return true;
-}
-static inline bool rcu_gp_is_expedited(void)  /* Internal RCU use. */
-{
-	return false;
-}
-
-static inline void rcu_expedite_gp(void)
-{
-}
-
-static inline void rcu_unexpedite_gp(void)
-{
-}
-#else /* #ifdef CONFIG_TINY_RCU */
-bool rcu_gp_is_normal(void);     /* Internal RCU use. */
-bool rcu_gp_is_expedited(void);  /* Internal RCU use. */
-void rcu_expedite_gp(void);
-void rcu_unexpedite_gp(void);
-void rcupdate_announce_bootup_oddness(void);
-#endif /* #else #ifdef CONFIG_TINY_RCU */
-
 enum rcutorture_type {
 	RCU_FLAVOR,
 	RCU_BH_FLAVOR,
diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
index 73e16ec4054b..ceb78110db1b 100644
--- a/kernel/rcu/rcu.h
+++ b/kernel/rcu/rcu.h
@@ -293,4 +293,30 @@ static inline void rcu_init_levelspread(int *levelspread, const int *levelcnt)
 
 #endif /* #if defined(SRCU) || !defined(TINY_RCU) */
 
+#ifdef CONFIG_TINY_RCU
+/* Tiny RCU doesn't expedite, as its purpose in life is instead to be tiny. */
+static inline bool rcu_gp_is_normal(void)  /* Internal RCU use. */
+{
+	return true;
+}
+static inline bool rcu_gp_is_expedited(void)  /* Internal RCU use. */
+{
+	return false;
+}
+
+static inline void rcu_expedite_gp(void)
+{
+}
+
+static inline void rcu_unexpedite_gp(void)
+{
+}
+#else /* #ifdef CONFIG_TINY_RCU */
+bool rcu_gp_is_normal(void);     /* Internal RCU use. */
+bool rcu_gp_is_expedited(void);  /* Internal RCU use. */
+void rcu_expedite_gp(void);
+void rcu_unexpedite_gp(void);
+void rcupdate_announce_bootup_oddness(void);
+#endif /* #else #ifdef CONFIG_TINY_RCU */
+
 #endif /* __LINUX_RCU_H */
diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c
index d80f11d9f8bd..3cc18110b612 100644
--- a/kernel/rcu/rcuperf.c
+++ b/kernel/rcu/rcuperf.c
@@ -48,6 +48,8 @@
 #include <linux/torture.h>
 #include <linux/vmalloc.h>
 
+#include "rcu.h"
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Paul E. McKenney <paulmck@...ux.vnet.ibm.com>");
 
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index a58592b73f19..03cdf79e73d4 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -52,6 +52,8 @@
 #include <linux/torture.h>
 #include <linux/vmalloc.h>
 
+#include "rcu.h"
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Paul E. McKenney <paulmck@...ibm.com> and Josh Triplett <josh@...htriplett.org>");
 
-- 
2.5.2