linux-kernel - [PATCH-cgroup 3/5] cgroup: Make Kconfig prompt of debug cgroup more accurate

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Date:   Tue, 13 Jun 2017 17:18:03 -0400
From:   Waiman Long <longman@...hat.com>
To:     Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>
Cc:     cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com, pjt@...gle.com, luto@...capital.net,
        efault@....de, torvalds@...ux-foundation.org,
        Waiman Long <longman@...hat.com>
Subject: [PATCH-cgroup 3/5] cgroup: Make Kconfig prompt of debug cgroup more accurate

The Kconfig prompt and description of the debug cgroup controller
more accurate by saying that it is for debug purpose only and its
interfaces are unstable.

Signed-off-by: Waiman Long <longman@...hat.com>
---
 init/Kconfig          | 7 +++++--
 kernel/cgroup/debug.c | 6 ++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index 1d3475f..5f9d139 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1205,11 +1205,14 @@ config CGROUP_BPF
 	  inet sockets.
 
 config CGROUP_DEBUG
-	bool "Example controller"
+	bool "Debug controller"
 	default n
+	depends on DEBUG_KERNEL
 	help
 	  This option enables a simple controller that exports
-	  debugging information about the cgroups framework.
+	  debugging information about the cgroups framework. This
+	  controller is for control cgroup debugging only. Its
+	  interfaces are not stable.
 
 	  Say N.
 
diff --git a/kernel/cgroup/debug.c b/kernel/cgroup/debug.c
index 1c209aa..cbe77a2 100644
--- a/kernel/cgroup/debug.c
+++ b/kernel/cgroup/debug.c
@@ -1,3 +1,9 @@
+/*
+ * Debug controller
+ *
+ * WARNING: This controller is for cgroup core debugging only.
+ * Its interfaces are unstable and subject to changes at any time.
+ */
 #include <linux/ctype.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
-- 
1.8.3.1