linux-kernel - Re: [PATCH 1/1] clk: Fix build warnings

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Date:	Mon, 30 Jun 2014 16:37:12 +0300
From:	Peter De Schrijver <pdeschrijver@...dia.com>
To:	Sachin Kamat <sachin.kamat@...sung.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"mturquette@...aro.org" <mturquette@...aro.org>,
	"spk.linux@...il.com" <spk.linux@...il.com>
Subject: Re: [PATCH 1/1] clk: Fix build warnings

On Mon, Jun 30, 2014 at 11:40:54AM +0200, Sachin Kamat wrote:
> ‘all_lists’ and ‘orphan_list’ is accessed only when DEBUG_FS is defined.
> Thus, make their compilation conditional to fix the below warnings introduced
> by commit 27b8d5f723 ("clk: flatten clk tree in debugfs"):
> drivers/clk/clk.c:40:27: warning: ‘all_lists’ defined but not used [-Wunused-variable]
> drivers/clk/clk.c:46:27: warning: ‘orphan_list’ defined but not used [-Wunused-variable]
> 

Maybe just move them inside the existing #ifdef CONFIG_DEBUG_FS / #endif?

Like:

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 7dfb2f3..3b735de 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -36,17 +36,6 @@ static HLIST_HEAD(clk_root_list);
 static HLIST_HEAD(clk_orphan_list);
 static LIST_HEAD(clk_notifier_list);
 
-static struct hlist_head *all_lists[] = {
-	&clk_root_list,
-	&clk_orphan_list,
-	NULL,
-};
-
-static struct hlist_head *orphan_list[] = {
-	&clk_orphan_list,
-	NULL,
-};
-
 /***           locking             ***/
 static void clk_prepare_lock(void)
 {
@@ -108,6 +97,17 @@ static void clk_enable_unlock(unsigned long flags)
 #ifdef CONFIG_DEBUG_FS
 #include <linux/debugfs.h>
 
+static struct hlist_head *all_lists[] = {
+	&clk_root_list,
+	&clk_orphan_list,
+	NULL,
+};
+
+static struct hlist_head *orphan_list[] = {
+	&clk_orphan_list,
+	NULL,
+};
+
 static struct dentry *rootdir;
 static int inited = 0;
 
Thanks for finding this.

Cheers,

Peter.
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