linux-kernel - Re: [PATCH] z3fold: use %z modifier for format string

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Date:   Fri, 25 Nov 2016 08:35:47 +0100
From:   Vitaly Wool <vitalywool@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Dan Streetman <ddstreet@...e.org>,
        zhong jiang <zhongjiang@...wei.com>,
        Linux-MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] z3fold: use %z modifier for format string

Hi Arnd,

On Thu, Nov 24, 2016 at 5:31 PM, Arnd Bergmann <arnd@...db.de> wrote:
> Printing a size_t requires the %zd format rather than %d:
>
> mm/z3fold.c: In function ‘init_z3fold’:
> include/linux/kern_levels.h:4:18: error: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Werror=format=]
>
> Fixes: 50a50d2676c4 ("z3fold: don't fail kernel build if z3fold_header is too big")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Acked-by: Vitaly Wool <vitalywool@...il.com>

And thanks :)

~vitaly

> ---
>  mm/z3fold.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/z3fold.c b/mm/z3fold.c
> index e282ba073e77..66ac7a7dc934 100644
> --- a/mm/z3fold.c
> +++ b/mm/z3fold.c
> @@ -884,7 +884,7 @@ static int __init init_z3fold(void)
>  {
>         /* Fail the initialization if z3fold header won't fit in one chunk */
>         if (sizeof(struct z3fold_header) > ZHDR_SIZE_ALIGNED) {
> -               pr_err("z3fold: z3fold_header size (%d) is bigger than "
> +               pr_err("z3fold: z3fold_header size (%zd) is bigger than "
>                         "the chunk size (%d), can't proceed\n",
>                         sizeof(struct z3fold_header) , ZHDR_SIZE_ALIGNED);
>                 return -E2BIG;
> --
> 2.9.0
>