Live Patching
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From: Josh Poimboeuf <jpoimboe@kernel.org>
To: Yafang Shao <laoar.shao@gmail.com>
Cc: jikos@kernel.org, mbenes@suse.cz, pmladek@suse.com,
	 joe.lawrence@redhat.com, song@kernel.org,
	live-patching@vger.kernel.org
Subject: Re: [PATCH v7 for-next 2/8] livepatch: Call klp_init_patch_early() earlier
Date: Thu, 27 Aug 2026 16:57:09 -0700	[thread overview]
Message-ID: <apDOvYOV0DtouAVF@jpoimboe> (raw)
In-Reply-To: <20260825114641.80452-3-laoar.shao@gmail.com>

On Tue, Aug 25, 2026 at 07:46:35PM +0800, Yafang Shao wrote:
> 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>
> Acked-by: Song Liu <song@kernel.org>
> ---
>  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;

Stray newline.

-- 
Josh

  parent reply	other threads:[~2026-08-27 23:57 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-25 11:46 [PATCH v7 for-next 0/8] livepatch: Introduce replace set support Yafang Shao
2026-08-25 11:46 ` [PATCH v7 for-next 1/8] livepatch: Make klp_find_func() non static Yafang Shao
2026-08-25 11:46 ` [PATCH v7 for-next 2/8] livepatch: Call klp_init_patch_early() earlier Yafang Shao
2026-08-25 12:06   ` sashiko-bot
2026-08-25 12:11     ` Yafang Shao
2026-08-27 23:57   ` Josh Poimboeuf [this message]
2026-08-28  2:24     ` Yafang Shao
2026-08-25 11:46 ` [PATCH v7 for-next 3/8] livepatch: Implement replace set for scoped atomic replace Yafang Shao
2026-08-25 11:59   ` sashiko-bot
2026-08-25 12:10     ` Yafang Shao
2026-08-28  0:26   ` Josh Poimboeuf
2026-08-28  3:03     ` Yafang Shao
2026-08-28  3:39       ` Josh Poimboeuf
2026-08-28  5:42         ` Yafang Shao
2026-09-02  7:31   ` Replace rules: was: " Petr Mladek
2026-09-02  9:40     ` Yafang Shao
2026-09-02 11:50       ` Yafang Shao
2026-09-03 10:01         ` Petr Mladek
2026-09-06  2:58           ` Yafang Shao
2026-09-03  9:27       ` Petr Mladek
2026-09-03 21:18         ` Song Liu
2026-09-02  7:34   ` documentation: " Petr Mladek
2026-09-02  9:50     ` Yafang Shao
2026-09-03  7:30       ` Petr Mladek
2026-09-02  7:37   ` code cleanup: " Petr Mladek
2026-09-02  9:52     ` Yafang Shao
2026-08-25 11:46 ` [PATCH v7 for-next 4/8] livepatch: Deprecate stack_order Yafang Shao
2026-08-28  0:29   ` Josh Poimboeuf
2026-08-28  3:14     ` Yafang Shao
2026-09-02 12:01   ` Petr Mladek
2026-09-02 12:20     ` Yafang Shao
2026-08-25 11:46 ` [PATCH v7 for-next 5/8] selftests/livepatch: Adapt atomic replace tests to provides/obsoletes Yafang Shao
2026-08-28  0:31   ` Josh Poimboeuf
2026-08-28  3:56     ` Yafang Shao
2026-09-02 13:45   ` Petr Mladek
2026-09-03  3:23     ` Yafang Shao
2026-08-25 11:46 ` [PATCH v7 for-next 6/8] selftests/livepatch: Add provides/obsoletes test scenarios Yafang Shao
2026-09-02 15:15   ` Petr Mladek
2026-09-03  5:43     ` Yafang Shao
2026-08-25 11:46 ` [PATCH v7 for-next 7/8] selftests/livepatch: Add test for state ID conflict across provides Yafang Shao
2026-09-02 15:25   ` Petr Mladek
2026-09-03  5:44     ` Yafang Shao
2026-08-25 11:46 ` [PATCH v7 for-next 8/8] selftests/livepatch: Add test for function " Yafang Shao
2026-09-02 15:51   ` Petr Mladek
2026-09-03  5:48     ` Yafang Shao

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