linux-kernel - [PATCH 5/7] rcu: move gp_state_names[] and gp_state_getname() to tree

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Message-Id: <20191015102850.2079-3-laijs@linux.alibaba.com>
Date:   Tue, 15 Oct 2019 10:28:47 +0000
From:   Lai Jiangshan <laijs@...ux.alibaba.com>
To:     linux-kernel@...r.kernel.org
Cc:     Lai Jiangshan <laijs@...ux.alibaba.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Joel Fernandes <joel@...lfernandes.org>, rcu@...r.kernel.org
Subject: [PATCH 5/7] rcu: move gp_state_names[] and gp_state_getname() to tree_stall.h

Only tree_stall.h needs to get name from GP state.

Signed-off-by: Lai Jiangshan <jiangshanlai@...il.com>
Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
---
 kernel/rcu/tree.c       | 10 ----------
 kernel/rcu/tree.h       | 12 ------------
 kernel/rcu/tree_stall.h | 22 ++++++++++++++++++++++
 3 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 7830d5a06e69..7db5ea06a9ed 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -529,16 +529,6 @@ static struct rcu_node *rcu_get_root(void)
 	return &rcu_state.node[0];
 }
 
-/*
- * Convert a ->gp_state value to a character string.
- */
-static const char *gp_state_getname(short gs)
-{
-	if (gs < 0 || gs >= ARRAY_SIZE(gp_state_names))
-		return "???";
-	return gp_state_names[gs];
-}
-
 /*
  * Send along grace-period-related data for rcutorture diagnostics.
  */
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 823f475c5e35..75ae55b6270a 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -367,18 +367,6 @@ struct rcu_state {
 #define RCU_GP_CLEANUP   7	/* Grace-period cleanup started. */
 #define RCU_GP_CLEANED   8	/* Grace-period cleanup complete. */
 
-static const char * const gp_state_names[] = {
-	"RCU_GP_IDLE",
-	"RCU_GP_WAIT_GPS",
-	"RCU_GP_DONE_GPS",
-	"RCU_GP_ONOFF",
-	"RCU_GP_INIT",
-	"RCU_GP_WAIT_FQS",
-	"RCU_GP_DOING_FQS",
-	"RCU_GP_CLEANUP",
-	"RCU_GP_CLEANED",
-};
-
 /*
  * In order to export the rcu_state name to the tracing tools, it
  * needs to be added in the __tracepoint_string section.
diff --git a/kernel/rcu/tree_stall.h b/kernel/rcu/tree_stall.h
index 806f2ddc8f74..0b75426ebb3e 100644
--- a/kernel/rcu/tree_stall.h
+++ b/kernel/rcu/tree_stall.h
@@ -277,6 +277,28 @@ static void print_cpu_stall_fast_no_hz(char *cp, int cpu)
 
 #endif /* #else #ifdef CONFIG_RCU_FAST_NO_HZ */
 
+static const char * const gp_state_names[] = {
+	[RCU_GP_IDLE] = "RCU_GP_IDLE",
+	[RCU_GP_WAIT_GPS] = "RCU_GP_WAIT_GPS",
+	[RCU_GP_DONE_GPS] = "RCU_GP_DONE_GPS",
+	[RCU_GP_ONOFF] = "RCU_GP_ONOFF",
+	[RCU_GP_INIT] = "RCU_GP_INIT",
+	[RCU_GP_WAIT_FQS] = "RCU_GP_WAIT_FQS",
+	[RCU_GP_DOING_FQS] = "RCU_GP_DOING_FQS",
+	[RCU_GP_CLEANUP] = "RCU_GP_CLEANUP",
+	[RCU_GP_CLEANED] = "RCU_GP_CLEANED",
+};
+
+/*
+ * Convert a ->gp_state value to a character string.
+ */
+static const char *gp_state_getname(short gs)
+{
+	if (gs < 0 || gs >= ARRAY_SIZE(gp_state_names))
+		return "???";
+	return gp_state_names[gs];
+}
+
 /*
  * Print out diagnostic information for the specified stalled CPU.
  *
-- 
2.20.1