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From: Yang Shi <shy828301@gmail.com>
To: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Linux MM <linux-mm@kvack.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 5/5] mm: migrate: Remove redundant goto labels
Date: Thu, 5 Aug 2021 12:54:19 -0700	[thread overview]
Message-ID: <CAHbLzkrqwOp0a_6Vzn29h9qwCiwVSLL6QzsMLfOYTWj7mtkNZg@mail.gmail.com> (raw)
In-Reply-To: <d359dcf73a7a868f1b126cb73368fea64aec1f25.1628174413.git.baolin.wang@linux.alibaba.com>

On Thu, Aug 5, 2021 at 8:06 AM Baolin Wang
<baolin.wang@linux.alibaba.com> wrote:
>
> Remove redundant goto labels to simplify the code.

TBH I don't see too much benefit. The "goto" makes the functions have
a single exit point.

>
> Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
> ---
>  mm/migrate.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/mm/migrate.c b/mm/migrate.c
> index 0ab364f..ed74fda 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -911,9 +911,8 @@ static int move_to_new_page(struct page *newpage, struct page *page,
>                  */
>                 VM_BUG_ON_PAGE(!PageIsolated(page), page);
>                 if (!PageMovable(page)) {
> -                       rc = MIGRATEPAGE_SUCCESS;
>                         __ClearPageIsolated(page);
> -                       goto out;
> +                       return MIGRATEPAGE_SUCCESS;
>                 }
>
>                 rc = mapping->a_ops->migratepage(mapping, newpage,
> @@ -949,7 +948,7 @@ static int move_to_new_page(struct page *newpage, struct page *page,
>                         flush_dcache_page(newpage);
>
>         }
> -out:
> +
>         return rc;
>  }
>
> @@ -2095,11 +2094,10 @@ static struct page *alloc_misplaced_dst_page_thp(struct page *page,
>         newpage = alloc_pages_node(nid, (GFP_TRANSHUGE_LIGHT | __GFP_THISNODE),
>                                    HPAGE_PMD_ORDER);
>         if (!newpage)
> -               goto out;
> +               return NULL;
>
>         prep_transhuge_page(newpage);
>
> -out:
>         return newpage;
>  }
>
> --
> 1.8.3.1
>
>

  reply	other threads:[~2021-08-05 19:54 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-05 15:05 [PATCH 0/5] Some cleanup for page migration Baolin Wang
2021-08-05 15:05 ` [PATCH 1/5] mm: migrate: Move the page count validation to the proper place Baolin Wang
2021-08-05 15:17   ` Matthew Wilcox
2021-08-06  3:07     ` Baolin Wang
2021-08-07  2:02       ` Matthew Wilcox
2021-08-08  2:55         ` Baolin Wang
2021-08-08 10:26           ` Matthew Wilcox
2021-08-08 15:13             ` Baolin Wang
2021-08-08 16:01               ` Matthew Wilcox
2021-08-09  4:19                 ` Baolin Wang
2021-08-05 15:05 ` [PATCH 2/5] mm: migrate: Introduce a local variable to get the number of pages Baolin Wang
2021-08-05 17:42   ` Yang Shi
2021-08-05 15:05 ` [PATCH 3/5] mm: migrate: Fix the incorrect function name in comments Baolin Wang
2021-08-05 17:26   ` Yang Shi
2021-08-09 13:59   ` Alistair Popple
2021-08-05 15:05 ` [PATCH 4/5] mm: migrate: Change to use bool type for 'page_was_mapped' Baolin Wang
2021-08-05 17:34   ` Yang Shi
2021-08-05 15:06 ` [PATCH 5/5] mm: migrate: Remove redundant goto labels Baolin Wang
2021-08-05 19:54   ` Yang Shi [this message]
2021-08-06  3:20     ` Baolin Wang
2021-08-06 17:17       ` Yang Shi
2021-08-08  2:56         ` Baolin Wang

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