[PV-onHVM][PATCH 3/3] Fix bad symbol reference

[Ben Guthro <bguthro@virtualiron.com>]

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This fixes a bug causing a bogus symbol reference (to init_page_count) 
in the PV-on-HVM drivers for 2.6 kernels that define the set_page_count 
macro.

Signed-off-by: Ben Guthro <bguthro@virtualiron.com>
Signed-off-by: Dave Lively <dlively@virtualiron.com>

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diff -r e2956856259c include/xen/gnttab.h
--- a/include/xen/gnttab.h	Tue Sep 04 13:49:56 2007 -0400
+++ b/include/xen/gnttab.h	Tue Sep 04 15:16:47 2007 -0400
@@ -108,11 +108,15 @@ static inline void __gnttab_dma_unmap_pa
 {
 }
 
-static inline void gnttab_reset_grant_page(struct page *page)
-{
-	init_page_count(page);
-	reset_page_mapcount(page);
-}
+/* init_page_count() is conditionally redefined by xen/platform-compat.h, so
+ * we can't inline a call to it.
+ */
+#define gnttab_reset_grant_page(p)		\
+	do {					\
+		struct page *_page = p;	        \
+		init_page_count(_page);		\
+		reset_page_mapcount(_page);	\
+	} while (0);				\
 
 int gnttab_suspend(void);
 int gnttab_resume(void);

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