linux-kernel - [PATCH] livepatch.h: Add comment to klp transition state

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Date: Mon, 29 Apr 2024 15:26:28 +0800
From: zhangwarden@...il.com
To: jpoimboe@...nel.org,
	mbenes@...e.cz,
	jikos@...nel.org,
	pmladek@...e.com,
	joe.lawrence@...hat.com
Cc: live-patching@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Wardenjohn <zhangwarden@...il.com>
Subject: [PATCH] livepatch.h: Add comment to klp transition state

From: Wardenjohn <zhangwarden@...il.com>

livepatch.h use KLP_UNDEFINED\KLP_UNPATCHED\KLP_PATCHED for klp transition state.
When livepatch is ready but idle, using KLP_UNDEFINED seems very confusing.
In order not to introduce potential risks to kernel, just update comment
to these state.
---
 include/linux/livepatch.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/livepatch.h b/include/linux/livepatch.h
index 9b9b38e89563..b6a214f2f8e3 100644
--- a/include/linux/livepatch.h
+++ b/include/linux/livepatch.h
@@ -18,9 +18,9 @@
 #if IS_ENABLED(CONFIG_LIVEPATCH)
 
 /* task patch states */
-#define KLP_UNDEFINED	-1
-#define KLP_UNPATCHED	 0
-#define KLP_PATCHED	 1
+#define KLP_UNDEFINED	-1 /* idle, no transition in progress */
+#define KLP_UNPATCHED	 0 /* transitioning to unpatched state */
+#define KLP_PATCHED	 1 /* transitioning to patched state */
 
 /**
  * struct klp_func - function structure for live patching
-- 
2.37.3