From mboxrd@z Thu Jan  1 00:00:00 1970
From: SF Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 19 Jul 2016 21:08:24 +0000
Subject: Re: [PATCH] sh-DWARF: Delete unnecessary checks before the function call "mempool_destroy"
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To: Rich Felker <dalias@libc.org>, Yoshinori Sato <ysato@users.sourceforge.jp>, linux-sh@vger.kernel.org
Cc: LKML <linux-kernel@vger.kernel.org>, kernel-janitors@vger.kernel.org, Julia Lawall <julia.lawall@lip6.fr>, David Rientjes <rientjes@google.com>

> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Mon, 16 Nov 2015 08:20:36 +0100
> 
> The mempool_destroy() function tests whether its argument is NULL
> and then returns immediately. Thus the test around the calls is not needed.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
>  arch/sh/kernel/dwarf.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c
> index 9d209a0..e1d751a 100644
> --- a/arch/sh/kernel/dwarf.c
> +++ b/arch/sh/kernel/dwarf.c
> @@ -1009,10 +1009,8 @@ static void __init dwarf_unwinder_cleanup(void)
>  	rbtree_postorder_for_each_entry_safe(cie, next_cie, &cie_root, node)
>  		kfree(cie);
>  
> -	if (dwarf_reg_pool)
> -		mempool_destroy(dwarf_reg_pool);
> -	if (dwarf_frame_pool)
> -		mempool_destroy(dwarf_frame_pool);
> +	mempool_destroy(dwarf_reg_pool);
> +	mempool_destroy(dwarf_frame_pool);
>  	kmem_cache_destroy(dwarf_reg_cachep);
>  	kmem_cache_destroy(dwarf_frame_cachep);
>  }
> 

Would you like to integrate this update suggestion
into another source code repository?

Regards,
Markus