linux-kernel - Re: [PATCH 1/2] livepatch: remove unnecessary call to klp_find_object

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Message-ID: <20150304090004.GC15177@pathway.suse.cz>
Date:	Wed, 4 Mar 2015 10:00:04 +0100
From:	Petr Mladek <pmladek@...e.cz>
To:	Josh Poimboeuf <jpoimboe@...hat.com>
Cc:	Seth Jennings <sjenning@...hat.com>, Jiri Kosina <jkosina@...e.cz>,
	Vojtech Pavlik <vojtech@...e.cz>,
	live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	Miroslav Benes <mbenes@...e.cz>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	mingo@...nel.org, mathieu.desnoyers@...icios.com, oleg@...hat.com,
	paulmck@...ux.vnet.ibm.com, andi@...stfloor.org,
	rostedt@...dmis.org, tglx@...utronix.de
Subject: Re: [PATCH 1/2] livepatch: remove unnecessary call to
 klp_find_object_module()

On Tue 2015-03-03 17:02:21, Josh Poimboeuf wrote:
> klp_find_object_module() is called from both the klp register and enable
> paths.  Only the call from the register path is necessary because the
> module notifier will let us know if the patched module gets loaded or
> unloaded.
> 
> Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>

Reviewed-by: Petr Mladek <pmladek@...e.cz>

Yup, the call is redundant.

Best Regards,
Petr

> ---
>  kernel/livepatch/core.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
> index 01ca088..a74e4e8 100644
> --- a/kernel/livepatch/core.c
> +++ b/kernel/livepatch/core.c
> @@ -541,8 +541,6 @@ static int __klp_enable_patch(struct klp_patch *patch)
>  	pr_notice("enabling patch '%s'\n", patch->mod->name);
>  
>  	for (obj = patch->objs; obj->funcs; obj++) {
> -		klp_find_object_module(obj);
> -
>  		if (!klp_is_object_loaded(obj))
>  			continue;
>  
> -- 
> 2.1.0
> 
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