linux-kernel - Re: [PATCH 3/3] mm: vmalloc: mark zero

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Date:   Thu, 23 Mar 2023 12:06:25 +0000
From:   Lorenzo Stoakes <lstoakes@...il.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Uladzislau Rezki <urezki@...il.com>,
        Christoph Hellwig <hch@...radead.org>,
        Baoquan He <bhe@...hat.com>,
        David Hildenbrand <david@...hat.com>,
        Andrey Konovalov <andreyknvl@...il.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] mm: vmalloc: mark zero_iter() static

On Thu, Mar 23, 2023 at 12:58:36PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
>
> The zero_iter() function was put into the global namespace,
> apparently by accident:
>
> mm/vmalloc.c:3448:8: error: no previous prototype for function 'zero_iter' [-Werror,-Wmissing-prototypes]
> size_t zero_iter(struct iov_iter *iter, size_t count)
>        ^
> mm/vmalloc.c:3448:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
> size_t zero_iter(struct iov_iter *iter, size_t count)
> ^
>
> Fixes: d9cab54f7737 ("mm: vmalloc: convert vread() to vread_iter()")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  mm/vmalloc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> index fb216495fe5a..55f5d6fc8629 100644
> --- a/mm/vmalloc.c
> +++ b/mm/vmalloc.c
> @@ -3445,7 +3445,7 @@ EXPORT_SYMBOL(vmalloc_32_user);
>   *
>   * Returns the number of zeroed bytes.
>   */
> -size_t zero_iter(struct iov_iter *iter, size_t count)
> +static size_t zero_iter(struct iov_iter *iter, size_t count)
>  {
>  	size_t remains = count;
>
> --
> 2.39.2
>
>

And finally, this was also fixed in the latest version (v8) see
https://lore.kernel.org/all/cover.1679566220.git.lstoakes@gmail.com

Again do forgive the noise! :)