[RFC][PATCH 1/9] pfn_to_kaddr() for UML

[Peter Zijlstra <a.p.zijlstra@chello.nl>]

Update UML with a proper 'pfn_to_kaddr()' definition, the VM deadlock
avoidance framework uses it.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Daniel Phillips <phillips@google.com>

---
 include/asm-um/page.h |    2 ++
 1 file changed, 2 insertions(+)

Index: linux-2.6/include/asm-um/page.h
===================================================================
--- linux-2.6.orig/include/asm-um/page.h
+++ linux-2.6/include/asm-um/page.h
@@ -111,6 +111,8 @@ extern unsigned long uml_physmem;
 #define pfn_valid(pfn) ((pfn) < max_mapnr)
 #define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
 
+#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
+
 extern struct page *arch_validate(struct page *page, gfp_t mask, int order);
 #define HAVE_ARCH_VALIDATE
 
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