OpenRISC: BUG: failure at mm/page_alloc.c:2467/free_pages()!

Hi!

CONFIG_DEBUG_VM exposes this splat:

BUG: failure at mm/page_alloc.c:2467/free_pages()!

addr is 0xc100c000, but memory_end is 0x02000000.

Thanks,
//richard

virt_addr_valid() is broken (asm/page.h) as it's trying to compare to a phys_addr_t.

Something like the following looks better:

b/arch/openrisc/include/asm/page.h
index b041b34..c4ffaee 100644

@@ -94,8 +94,7 @@ extern unsigned long memory_end;
 
 #define pfn_valid(pfn)          ((pfn) < max_mapnr)
 
-#define virt_addr_valid(kaddr)  (((void *)(kaddr) >= (void

*)PAGE_OFFSET) && \
- ((void *)(kaddr) < (void *)memory_end))
+#define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr)))

#endif /* __ASSEMBLY__ */