linux-kernel - Re: [PATCH] mm: shmem: do not call PageHWPoison on a ERR-page

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Date:   Thu, 11 Nov 2021 17:10:24 +0530
From:   Ajay Garg <ajaygargnsit@...il.com>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     hughd@...gle.com, akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: shmem: do not call PageHWPoison on a ERR-page

>
> How about the following changes since the above if block
> already do the judgment?
>
> diff --git a/mm/shmem.c b/mm/shmem.c
> index f0eee4e221a7..0c84b6624026 100644
> --- a/mm/shmem.c
> +++ b/mm/shmem.c
> @@ -4195,13 +4195,13 @@ struct page *shmem_read_mapping_page_gfp(struct
> address_space *mapping,
>          BUG_ON(!shmem_mapping(mapping));
>          error = shmem_getpage_gfp(inode, index, &page, SGP_CACHE,
>                                    gfp, NULL, NULL, NULL);
> -       if (error)
> +       if (error) {
>                  page = ERR_PTR(error);
> -       else
> +       } else {
>                  unlock_page(page);
> -
> -       if (PageHWPoison(page))
> -               page = ERR_PTR(-EIO);
> +               if (PageHWPoison(page))
> +                       page = ERR_PTR(-EIO);
> +       }
>
>          return page;


You have

* simply put braces (not required for 1-liner if/else blocks)
* contributed nothing to the issue the patch addresses.

I hope this is not a deliberate joke/spam.