linux-kernel - Re: [PATCH] module: Fix "warning: variable 'exit' set but not used"

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Message-ID: <Yr9rEzCse4GSOEMU@bombadil.infradead.org>
Date:   Fri, 1 Jul 2022 14:45:55 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     linux-modules@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] module: Fix "warning: variable 'exit' set but not used"

On Sun, Jun 12, 2022 at 05:33:20PM +0200, Christophe Leroy wrote:
> When CONFIG_MODULE_UNLOAD is not selected, 'exit' is
> set but never used.
> 
> It is not possible to replace the #ifdef CONFIG_MODULE_UNLOAD by
> IS_ENABLED(CONFIG_MODULE_UNLOAD) because mod->exit doesn't exist
> when CONFIG_MODULE_UNLOAD is not selected.
> 
> And because of the rcu_read_lock_sched() section it is not easy
> to regroup everything in a single #ifdef. Let's regroup partially
> and add missing #ifdef to completely opt out the use of
> 'exit' when CONFIG_MODULE_UNLOAD is not selected.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>

Queued up thanks!

  Luis