2.6.12-rc5-mm1 - missing #define SECTIONS_SHIFT in sparsemem

[Valdis . Kletnieks]

sparsemem-memory-model.patch references SECTIONS_SHIFT without defining it.

Caught this while compiling with -Wundef, causes lots of warnings
when it gets used in include/linux/mm.h.  The appended patch Works For Me,
although I wonder if the *real* problem isn't a missing '#ifdef CONFIG_SPARSEMEM'
around the code that uses it in mm.h.  
 
Signed-Off-By: valdis.kletnieks@xxxxxx

--- linux-2.6.12-rc5-mm1/include/linux/mmzone.h.ifdef	2005-05-27 15:12:26.000000000 -0400
+++ linux-2.6.12-rc5-mm1/include/linux/mmzone.h	2005-05-27 16:26:40.000000000 -0400
@@ -568,6 +568,7 @@ static inline int pfn_valid(unsigned lon
 void sparse_init(void);
 #else
 #define sparse_init()	do {} while (0)
+#define SECTIONS_SHIFT	0
 #endif /* CONFIG_SPARSEMEM */
 
 #ifdef CONFIG_NODES_SPAN_OTHER_NODES

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