linux-kernel - Re: [PATCH] mm/memory.c follow_hugetlb

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Date:	Mon, 12 Nov 2007 08:41:55 -0600
From:	aglitke <agl@...ibm.com>
To:	Erez Zadok <ezk@...sunysb.edu>
Cc:	Ken Chen <kenchen@...gle.com>,
	David Gibson <hermes@...son.dropbear.id.au>,
	William Lee Irwin III <wli@...omorphy.com>,
	Badari Pulavarty <pbadari@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/memory.c follow_hugetlb_page compiler error (MMOTM)

Argh.  Who runs with CONFIG_HUGETLB_PAGE not set anyway ;)

Acked-by: Adam Litke <agl@...ibm.com>

On Sat, 2007-11-10 at 19:54 -0500, Erez Zadok wrote:
> Using http://userweb.kernel.org/~akpm/mmotm/ timestamped "10-Nov-2007
> 22:46". CONFIG_HUGETLB_PAGE not set.
> 
> $ make
>   CC      mm/memory.o
> mm/memory.c:1040:29: error: macro "follow_hugetlb_page" passed 8 arguments, but takes just 7
> mm/memory.c: In function 'get_user_pages':
> mm/memory.c:1039: error: 'follow_hugetlb_page' undeclared (first use in this function)
> mm/memory.c:1039: error: (Each undeclared identifier is reported only once
> mm/memory.c:1039: error: for each function it appears in.)
> make[1]: *** [mm/memory.o] Error 1
> make: *** [mm] Error 2
> 
> Small patch below fixes compile error.
> 
> Erez.
> 
> 
> Signed-off-by: Erez Zadok <ezk@...sunysb.edu>
> 
> diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
> index bb03660..2496879 100644
> --- a/include/linux/hugetlb.h
> +++ b/include/linux/hugetlb.h
> @@ -106,7 +106,7 @@ static inline unsigned long hugetlb_total_pages(void)
>  	return 0;
>  }
> 
> -#define follow_hugetlb_page(m,v,p,vs,a,b,i)	({ BUG(); 0; })
> +#define follow_hugetlb_page(m,v,p,vs,a,b,i,w)	({ BUG(); 0; })
>  #define follow_huge_addr(mm, addr, write)	ERR_PTR(-EINVAL)
>  #define copy_hugetlb_page_range(src, dst, vma)	({ BUG(); 0; })
>  #define hugetlb_prefault(mapping, vma)		({ BUG(); 0; })
> 
-- 
Adam Litke - (agl at us.ibm.com)
IBM Linux Technology Center

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