diff options
| author | Yafang Shao <laoar.shao@gmail.com> | 2025-02-27 10:47:32 +0800 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2025-03-04 15:59:07 +0100 |
| commit | 376c879e04fc7abec617bc6897479acd0b605f8c (patch) | |
| tree | 2c946ae442fe70f483626ea878df800c462e06b4 | |
| parent | 336088234e9f85f6221135ba698c41dbf3c9e78e (diff) | |
livepatch: Add comment to clarify klp_add_nops()
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: Petr Mladek <pmladek@suse.com>
Suggested-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20250227024733.16989-2-laoar.shao@gmail.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
| -rw-r--r-- | kernel/livepatch/core.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c index 0cd39954d5a1..4a0fb7978d0d 100644 --- a/kernel/livepatch/core.c +++ b/kernel/livepatch/core.c @@ -601,9 +601,12 @@ 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. + * Add 'nop' functions which simply return to the caller to run the + * original function. + * + * They are added only when the atomic replace mode is used and 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) { |