linux-kernel - Re: [PATCH] mm: add printf attribute to shrinker_debugfs_name

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Date:   Mon, 9 Oct 2023 17:50:06 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Lucy Mielke <lucymielke@...oud.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Qi Zheng <zhengqi.arch@...edance.com>
Subject: Re: [PATCH] mm: add printf attribute to shrinker_debugfs_name_alloc

On Fri, 6 Oct 2023 22:30:51 +0200 Lucy Mielke <lucymielke@...oud.com> wrote:

> This fixes a compiler warning when compiling an allyesconfig with W=1:
> 
> mm/internal.h:1235:9: error: function might be a candidate for ‘gnu_printf’
> format attribute [-Werror=suggest-attribute=format]

Thanks.  I added

Fixes: c42d50aefd17 ("mm: shrinker: add infrastructure for dynamically allocating shrinker")

to this.

> --- a/mm/internal.h
> +++ b/mm/internal.h
> @@ -1229,8 +1229,8 @@ unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg,
>  			  int priority);
>  
>  #ifdef CONFIG_SHRINKER_DEBUG
> -static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker,
> -					      const char *fmt, va_list ap)
> +static inline __printf(2, 0) int shrinker_debugfs_name_alloc(
> +			struct shrinker *shrinker, const char *fmt, va_list ap)
>  {
>  	shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap);
>  
> -- 
> 2.42.0