Live Patching
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From: Yafang Shao <laoar.shao@gmail.com>
To: jpoimboe@kernel.org, jikos@kernel.org, mbenes@suse.cz,
	pmladek@suse.com, joe.lawrence@redhat.com, song@kernel.org
Cc: live-patching@vger.kernel.org, Yafang Shao <laoar.shao@gmail.com>
Subject: [PATCH v5 3/9] livepatch: Call klp_init_patch_early() earlier
Date: Sun,  9 Aug 2026 17:19:47 +0800	[thread overview]
Message-ID: <20260809091954.22930-4-laoar.shao@gmail.com> (raw)
In-Reply-To: <20260809091954.22930-1-laoar.shao@gmail.com>

Invoke klp_init_patch_early() during early initialization to avoid
mixing for_each_() and for_each_*_static() variants later in the code.

No functional change. This prepares the code for an upcoming patch.

Suggested-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
---
 kernel/livepatch/core.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index c34306ecfb0b..3de3940d34b2 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -1145,13 +1145,6 @@ int klp_enable_patch(struct klp_patch *patch)
 
 	mutex_lock(&klp_mutex);
 
-	if (!klp_is_patch_compatible(patch)) {
-		pr_err("Livepatch patch (%s) is not compatible with the already installed livepatches.\n",
-			patch->mod->name);
-		mutex_unlock(&klp_mutex);
-		return -EINVAL;
-	}
-
 	if (!try_module_get(patch->mod)) {
 		mutex_unlock(&klp_mutex);
 		return -ENODEV;
@@ -1159,6 +1152,14 @@ int klp_enable_patch(struct klp_patch *patch)
 
 	klp_init_patch_early(patch);
 
+	if (!klp_is_patch_compatible(patch)) {
+		pr_err("Livepatch patch (%s) is not compatible with the already installed livepatches.\n",
+			patch->mod->name);
+		ret = -EINVAL;
+		goto err;
+	}
+
+
 	ret = klp_init_patch(patch);
 	if (ret)
 		goto err;
-- 
2.52.0


  parent reply	other threads:[~2026-08-09  9:20 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-09  9:19 [PATCH v5 0/9] livepatch: Introduce replace set support Yafang Shao
2026-08-09  9:19 ` [PATCH v5 1/9] livepatch: Fix wrong index in funcs cleanup error path Yafang Shao
2026-08-09  9:28   ` sashiko-bot
2026-08-09  9:36     ` Yafang Shao
2026-08-09  9:19 ` [PATCH v5 2/9] livepatch: Make klp_find_func() non static Yafang Shao
2026-08-09  9:32   ` sashiko-bot
2026-08-09  9:39     ` Yafang Shao
2026-08-09  9:19 ` Yafang Shao [this message]
2026-08-09  9:40   ` [PATCH v5 3/9] livepatch: Call klp_init_patch_early() earlier sashiko-bot
2026-08-09  9:19 ` [PATCH v5 4/9] livepatch: Implement replace set for scoped atomic replace Yafang Shao
2026-08-09  9:33   ` sashiko-bot
2026-08-09  9:19 ` [PATCH v5 5/9] livepatch: Deprecate stack_order Yafang Shao
2026-08-09  9:19 ` [PATCH v5 6/9] selftests: livepatch: Adapt atomic replace tests to provides/obsoletes Yafang Shao
2026-08-09  9:33   ` sashiko-bot
2026-08-09  9:45     ` Yafang Shao
2026-08-09  9:19 ` [PATCH v5 7/9] selftests: livepatch: Add provides/obsoletes test scenarios Yafang Shao
2026-08-09  9:31   ` sashiko-bot
2026-08-09  9:19 ` [PATCH v5 8/9] selftests: livepatch: Add test for state ID conflict across provides Yafang Shao
2026-08-09  9:19 ` [PATCH v5 9/9] selftests: livepatch: Add test for function " Yafang Shao
2026-08-09  9:49   ` sashiko-bot

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