linux-kernel - Re: [PATCH 22/24] swap: make swap_cluster

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Message-ID: <CAF8kJuPssXch+t5Rn0-dBzLPUCg-fid6PRaiTObc36L9Wqrzcg@mail.gmail.com>
Date:   Tue, 21 Nov 2023 21:20:14 -0800
From:   Chris Li <chrisl@...nel.org>
To:     Kairui Song <kasong@...cent.com>
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        "Huang, Ying" <ying.huang@...el.com>,
        David Hildenbrand <david@...hat.com>,
        Hugh Dickins <hughd@...gle.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Matthew Wilcox <willy@...radead.org>,
        Michal Hocko <mhocko@...e.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 22/24] swap: make swap_cluster_readahead static

Hi Kairui,

On Sun, Nov 19, 2023 at 11:49 AM Kairui Song <ryncsn@...il.com> wrote:
>
> From: Kairui Song <kasong@...cent.com>
>
> Now there is no caller outside the same file, make it static.

Seems to me too trivial/low value to justify as a standalone patch.

Chris

>
> Signed-off-by: Kairui Song <kasong@...cent.com>
> ---
>  mm/swap.h       | 8 --------
>  mm/swap_state.c | 4 ++--
>  2 files changed, 2 insertions(+), 10 deletions(-)
>
> diff --git a/mm/swap.h b/mm/swap.h
> index 4402970547e7..795a25df87da 100644
> --- a/mm/swap.h
> +++ b/mm/swap.h
> @@ -56,8 +56,6 @@ struct page *read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
>  struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
>                                      struct mempolicy *mpol, pgoff_t ilx,
>                                      bool *new_page_allocated);
> -struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t flag,
> -                                   struct mempolicy *mpol, pgoff_t ilx);
>  struct page *swapin_readahead(swp_entry_t entry, gfp_t flag,
>                               struct vm_fault *vmf, enum swap_cache_result *result);
>  struct page *swapin_page_non_fault(swp_entry_t entry, gfp_t gfp_mask,
> @@ -93,12 +91,6 @@ static inline void show_swap_cache_info(void)
>  {
>  }
>
> -static inline struct page *swap_cluster_readahead(swp_entry_t entry,
> -                       gfp_t gfp_mask, struct mempolicy *mpol, pgoff_t ilx)
> -{
> -       return NULL;
> -}
> -
>  static inline struct page *swapin_readahead(swp_entry_t swp, gfp_t gfp_mask,
>                         struct vm_fault *vmf, enum swap_cache_result *result)
>  {
> diff --git a/mm/swap_state.c b/mm/swap_state.c
> index 0433a2586c6d..b377e55cb850 100644
> --- a/mm/swap_state.c
> +++ b/mm/swap_state.c
> @@ -627,8 +627,8 @@ static unsigned long swapin_nr_pages(unsigned long offset)
>   * are used for every page of the readahead: neighbouring pages on swap
>   * are fairly likely to have been swapped out from the same node.
>   */
> -struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t gfp_mask,
> -                                   struct mempolicy *mpol, pgoff_t ilx)
> +static struct page *swap_cluster_readahead(swp_entry_t entry, gfp_t gfp_mask,
> +                                          struct mempolicy *mpol, pgoff_t ilx)
>  {
>         struct page *page;
>         unsigned long entry_offset = swp_offset(entry);
> --
> 2.42.0
>
>