[PATCH 1/3] livepatch: Add comment to clarify klp_add_nops()

[Yafang Shao <laoar.shao@gmail.com>]

Add detailed comments to clarify the purpose of klp_add_nops() function.
These comments are based on Petr's explanation[0].

Link: https://lore.kernel.org/all/Z6XUA7D0eU_YDMVp@pathway.suse.cz/ [0]
Suggested-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
---
 kernel/livepatch/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index 0cd39954d5a1..5b2a52e7c2f6 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -604,6 +604,9 @@ static int klp_add_object_nops(struct klp_patch *patch,
  * Add 'nop' functions which simply return to the caller to run
  * the original function. The 'nop' functions are added to a
  * patch to facilitate a 'replace' mode.
+ *
+ * The 'nop' entries are added only for functions which are currently
+ * livepatched but are no longer included in the new livepatch.
  */
 static int klp_add_nops(struct klp_patch *patch)
 {
-- 
2.43.5