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SubjectRe: [PATCH] mempool: add missing include
On Thu, 9 Apr 2015, Arnd Bergmann wrote:

> This is a fix^3 for the mempool poisoning patch, which introduces
> a compile-time error on some ARM randconfig builds:
> mm/mempool.c: In function 'check_element':
> mm/mempool.c:65:16: error: implicit declaration of function 'kmap_atomic' [-Werror=implicit-function-declaration]
> void *addr = kmap_atomic((struct page *)element);
> The problem is clearly the missing declaration, and including
> linux/highmem.h fixes it.
> Signed-off-by: Arnd Bergmann <>
> Fixes: a3db5a8463b0db ("mm, mempool: poison elements backed by page allocator fix fix")

Acked-by: David Rientjes <>

Thanks! Can you confirm that this is because CONFIG_BLOCK is disabled and
not something else?

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