linux-kernel - Re: [PATCH] mm: Neaten warn_alloc

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Date:	Thu, 25 Aug 2011 16:50:06 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] mm: Neaten warn_alloc_failed

On Thu, 25 Aug 2011 13:26:19 -0700
Joe Perches <joe@...ches.com> wrote:

> Add __attribute__((format (printf...) to the function
> to validate format and arguments.  Use vsprintf extension
> %pV to avoid any possible message interleaving. Coalesce
> format string.  Convert printks/pr_warning to pr_warn.
> 
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -1334,7 +1334,8 @@ extern void si_meminfo(struct sysinfo * val);
>  extern void si_meminfo_node(struct sysinfo *val, int nid);
>  extern int after_bootmem;
>  
> -extern void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...);
> +extern __attribute__((format (printf, 3, 4)))
> +void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...);
>  
>  extern void setup_per_cpu_pageset(void);
>  
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c

looky:

--- a/include/linux/mm.h~mm-neaten-warn_alloc_failed-fix
+++ a/include/linux/mm.h
@@ -1335,7 +1335,7 @@ extern void si_meminfo(struct sysinfo * 
 extern void si_meminfo_node(struct sysinfo *val, int nid);
 extern int after_bootmem;
 
-extern __attribute__((format (printf, 3, 4)))
+extern __printf(3, 4)
 void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...);
 
 extern void setup_per_cpu_pageset(void);
_

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