linux-kernel - Re: [PATCH] mm: remove unnecessary pointer variables

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Message-ID: <b33b6dfe-8270-4cee-bd66-1940f86b6e09@arm.com>
Date: Mon, 11 Aug 2025 10:00:39 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: Xichao Zhao <zhao.xichao@...o.com>, ryabinin.a.a@...il.com,
 akpm@...ux-foundation.org
Cc: glider@...gle.com, andreyknvl@...il.com, dvyukov@...gle.com,
 vincenzo.frascino@....com, kasan-dev@...glegroups.com, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: remove unnecessary pointer variables

On 11/08/25 9:12 AM, Xichao Zhao wrote:
> Simplify the code to enhance readability and maintain a consistent
> coding style.
> 
> Signed-off-by: Xichao Zhao <zhao.xichao@...o.com>
> ---
>  mm/kasan/init.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/mm/kasan/init.c b/mm/kasan/init.c
> index ced6b29fcf76..e5810134813c 100644
> --- a/mm/kasan/init.c
> +++ b/mm/kasan/init.c
> @@ -266,11 +266,9 @@ int __ref kasan_populate_early_shadow(const void *shadow_start,
>  		}
>  
>  		if (pgd_none(*pgd)) {
> -			p4d_t *p;
>  
>  			if (slab_is_available()) {
> -				p = p4d_alloc(&init_mm, pgd, addr);
> -				if (!p)
> +				if (!p4d_alloc(&init_mm, pgd, addr))
>  					return -ENOMEM;
>  			} else {
>  				pgd_populate(&init_mm, pgd,

Agreed that p4d_t pointer here is just redundant.

Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>