linux-kernel - Re: [PATCH 02/20] mm: zswap: inline and remove zswap_entry_find

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Message-ID: <CAKEwX=OcjhqjjZ9yYd38oNgk56q41qUt8_gJMjyRw=VCqveReA@mail.gmail.com>
Date: Tue, 30 Jan 2024 08:24:07 -0800
From: Nhat Pham <nphamcs@...il.com>
To: Johannes Weiner <hannes@...xchg.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>, Yosry Ahmed <yosryahmed@...gle.com>, 
	Chengming Zhou <zhouchengming@...edance.com>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/20] mm: zswap: inline and remove zswap_entry_find_get()

On Mon, Jan 29, 2024 at 5:42 PM Johannes Weiner <hannes@...xchg.org> wrote:
>
> There is only one caller and the function is trivial. Inline it.
>
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>
> ---
>  mm/zswap.c | 17 ++---------------
>  1 file changed, 2 insertions(+), 15 deletions(-)
>
> diff --git a/mm/zswap.c b/mm/zswap.c
> index 173f2e6657de..cf864aaa214d 100644
> --- a/mm/zswap.c
> +++ b/mm/zswap.c
> @@ -559,19 +559,6 @@ static void zswap_entry_put(struct zswap_entry *entry)
>         }
>  }
>
> -/* caller must hold the tree lock */
> -static struct zswap_entry *zswap_entry_find_get(struct rb_root *root,
> -                               pgoff_t offset)
> -{
> -       struct zswap_entry *entry;
> -
> -       entry = zswap_rb_search(root, offset);
> -       if (entry)
> -               zswap_entry_get(entry);
> -
> -       return entry;
> -}
> -
>  /*********************************
>  * shrinker functions
>  **********************************/
> @@ -1708,13 +1695,13 @@ bool zswap_load(struct folio *folio)
>
>         VM_WARN_ON_ONCE(!folio_test_locked(folio));
>
> -       /* find */
>         spin_lock(&tree->lock);
> -       entry = zswap_entry_find_get(&tree->rbroot, offset);
> +       entry = zswap_rb_search(&tree->rbroot, offset);
>         if (!entry) {
>                 spin_unlock(&tree->lock);
>                 return false;
>         }
> +       zswap_entry_get(entry);

Neat.
Reviewed-by: Nhat Pham <nphamcs@...il.com>

>         spin_unlock(&tree->lock);
>
>         if (entry->length)
> --
> 2.43.0
>