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

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Date:	Sat, 10 Nov 2007 19:54:51 -0500
From:	Erez Zadok <ezk@...sunysb.edu>
To:	Adam Litke <agl@...ibm.com>, 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>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] mm/memory.c follow_hugetlb_page compiler error (MMOTM)


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; })
-
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