linux-kernel - Re: [PATCH 04/15] mm/swap: remove unneeded return value of free_swap

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Message-ID: <YoS1qdiY4n2rTQsh@localhost.localdomain>
Date:   Wed, 18 May 2022 11:00:25 +0200
From:   Oscar Salvador <osalvador@...e.de>
To:     Miaohe Lin <linmiaohe@...wei.com>
Cc:     akpm@...ux-foundation.org, willy@...radead.org, vbabka@...e.cz,
        dhowells@...hat.com, neilb@...e.de, apopple@...dia.com,
        david@...hat.com, surenb@...gle.com, peterx@...hat.com,
        naoya.horiguchi@....com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/15] mm/swap: remove unneeded return value of
 free_swap_slot

On Mon, May 09, 2022 at 09:14:05PM +0800, Miaohe Lin wrote:
> The return value of free_swap_slot is always 0 and also ignored now.
> Remove it to clean up the code.
> 
> Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>

Reviewed-by: Oscar Salvador <osalvador@...e.de>

> ---
>  include/linux/swap_slots.h | 2 +-
>  mm/swap_slots.c            | 4 +---
>  2 files changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/include/linux/swap_slots.h b/include/linux/swap_slots.h
> index 347f1a304190..15adfb8c813a 100644
> --- a/include/linux/swap_slots.h
> +++ b/include/linux/swap_slots.h
> @@ -24,7 +24,7 @@ struct swap_slots_cache {
>  void disable_swap_slots_cache_lock(void);
>  void reenable_swap_slots_cache_unlock(void);
>  void enable_swap_slots_cache(void);
> -int free_swap_slot(swp_entry_t entry);
> +void free_swap_slot(swp_entry_t entry);
>  
>  extern bool swap_slot_cache_enabled;
>  
> diff --git a/mm/swap_slots.c b/mm/swap_slots.c
> index 0218ec1cd24c..2f877e6f87d7 100644
> --- a/mm/swap_slots.c
> +++ b/mm/swap_slots.c
> @@ -269,7 +269,7 @@ static int refill_swap_slots_cache(struct swap_slots_cache *cache)
>  	return cache->nr;
>  }
>  
> -int free_swap_slot(swp_entry_t entry)
> +void free_swap_slot(swp_entry_t entry)
>  {
>  	struct swap_slots_cache *cache;
>  
> @@ -297,8 +297,6 @@ int free_swap_slot(swp_entry_t entry)
>  direct_free:
>  		swapcache_free_entries(&entry, 1);
>  	}
> -
> -	return 0;
>  }
>  
>  swp_entry_t folio_alloc_swap(struct folio *folio)
> -- 
> 2.23.0
> 
> 

-- 
Oscar Salvador
SUSE Labs