From mboxrd@z Thu Jan  1 00:00:00 1970
From: labbott@redhat.com (Laura Abbott)
Date: Wed, 3 Feb 2016 14:30:09 -0800
Subject: [PATCH] mm/debug-pagealloc: add missing debug_pagealloc_enabled
In-Reply-To: <1454537757-3760706-1-git-send-email-arnd@arndb.de>
References: <1454537757-3760706-1-git-send-email-arnd@arndb.de>
Message-ID: <56B27F71.2000700@redhat.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On 02/03/2016 02:15 PM, Arnd Bergmann wrote:
> The change to move the pagealloc logic broke the slab allocator
> check when it's disabled at compile time:
>
> mm/slab.c: In function 'is_debug_pagealloc_cache':
> mm/slab.c:1608:29: error: implicit declaration of function 'debug_pagealloc_enabled' [-Werror=implicit-function-declaration]
>
> This adds an inline helper to get it to work again.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> Fixes: 0a244aea1a61 ("mm/slab: clean up DEBUG_PAGEALLOC processing code")
> ---
>   include/linux/mm.h | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 5d86eb2e8584..90d600ce56ad 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2242,6 +2242,7 @@ kernel_map_pages(struct page *page, int numpages, int enable)
>   extern bool kernel_page_present(struct page *page);
>   #endif /* CONFIG_HIBERNATION */
>   #else
> +static inline bool debug_pagealloc_enabled(void) { return 0; }
>   static inline void
>   kernel_map_pages(struct page *page, int numpages, int enable) {}
>   #ifdef CONFIG_HIBERNATION
>

I believe this should be fixed with http://article.gmane.org/gmane.linux.kernel.mm/145655