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Date: Wed, 7 Jan 2015 10:19:28 -0800
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: mingo@...nel.org, laijs@...fujitsu.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,
dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com,
bobby.prani@...il.com,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 02/12] rcu: Make _batches_completed() functions return unsigned long
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Long ago, the various ->completed fields were of type long, but now are
unsigned long due to signed-integer-overflow concerns. However, the
various _batches_completed() functions remained of type long, even though
their only purpose in life is to return the corresponding ->completed
field. This patch cleans this up by changing these functions' return
types to unsigned long.
Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
include/linux/rcutiny.h | 4 ++--
include/linux/rcutree.h | 6 +++---
kernel/rcu/tree.c | 4 ++--
kernel/rcu/tree.h | 2 +-
kernel/rcu/tree_plugin.h | 6 +++---
5 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h
index 0e5366200154..91f7e4c37800 100644
--- a/include/linux/rcutiny.h
+++ b/include/linux/rcutiny.h
@@ -94,7 +94,7 @@ static inline void rcu_virt_note_context_switch(int cpu)
/*
* Return the number of grace periods.
*/
-static inline long rcu_batches_completed(void)
+static inline unsigned long rcu_batches_completed(void)
{
return 0;
}
@@ -102,7 +102,7 @@ static inline long rcu_batches_completed(void)
/*
* Return the number of bottom-half grace periods.
*/
-static inline long rcu_batches_completed_bh(void)
+static inline unsigned long rcu_batches_completed_bh(void)
{
return 0;
}
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index 52953790dcca..9885bfb6b123 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -81,9 +81,9 @@ void cond_synchronize_rcu(unsigned long oldstate);
extern unsigned long rcutorture_testseq;
extern unsigned long rcutorture_vernum;
-long rcu_batches_completed(void);
-long rcu_batches_completed_bh(void);
-long rcu_batches_completed_sched(void);
+unsigned long rcu_batches_completed(void);
+unsigned long rcu_batches_completed_bh(void);
+unsigned long rcu_batches_completed_sched(void);
void show_rcu_gp_kthreads(void);
void rcu_force_quiescent_state(void);
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 4c106fcc0d54..e26d78712e16 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -317,7 +317,7 @@ static int rcu_pending(void);
/*
* Return the number of RCU-sched batches processed thus far for debug & stats.
*/
-long rcu_batches_completed_sched(void)
+unsigned long rcu_batches_completed_sched(void)
{
return rcu_sched_state.completed;
}
@@ -326,7 +326,7 @@ EXPORT_SYMBOL_GPL(rcu_batches_completed_sched);
/*
* Return the number of RCU BH batches processed thus far for debug & stats.
*/
-long rcu_batches_completed_bh(void)
+unsigned long rcu_batches_completed_bh(void)
{
return rcu_bh_state.completed;
}
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 8e7b1843896e..1a07d7379ac6 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -546,7 +546,7 @@ DECLARE_PER_CPU(char, rcu_cpu_has_work);
/* Forward declarations for rcutree_plugin.h */
static void rcu_bootup_announce(void);
-long rcu_batches_completed(void);
+unsigned long rcu_batches_completed(void);
static void rcu_preempt_note_context_switch(void);
static int rcu_preempt_blocked_readers_cgp(struct rcu_node *rnp);
#ifdef CONFIG_HOTPLUG_CPU
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 3ec85cb5d544..f69300d4a51f 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -117,7 +117,7 @@ static void __init rcu_bootup_announce(void)
* Return the number of RCU-preempt batches processed thus far
* for debug and statistics.
*/
-static long rcu_batches_completed_preempt(void)
+static unsigned long rcu_batches_completed_preempt(void)
{
return rcu_preempt_state.completed;
}
@@ -126,7 +126,7 @@ EXPORT_SYMBOL_GPL(rcu_batches_completed_preempt);
/*
* Return the number of RCU batches processed thus far for debug & stats.
*/
-long rcu_batches_completed(void)
+unsigned long rcu_batches_completed(void)
{
return rcu_batches_completed_preempt();
}
@@ -935,7 +935,7 @@ static void __init rcu_bootup_announce(void)
/*
* Return the number of RCU batches processed thus far for debug & stats.
*/
-long rcu_batches_completed(void)
+unsigned long rcu_batches_completed(void)
{
return rcu_batches_completed_sched();
}
--
1.8.1.5
--
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