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Diffstat (limited to 'include/asm-x86_64/mmzone.h')
-rw-r--r--include/asm-x86_64/mmzone.h9
1 files changed, 3 insertions, 6 deletions
diff --git a/include/asm-x86_64/mmzone.h b/include/asm-x86_64/mmzone.h
index b40c661f111..69baaa8a3ce 100644
--- a/include/asm-x86_64/mmzone.h
+++ b/include/asm-x86_64/mmzone.h
@@ -17,16 +17,15 @@
/* Simple perfect hash to map physical addresses to node numbers */
extern int memnode_shift;
extern u8 memnodemap[NODEMAPSIZE];
-extern int maxnode;
extern struct pglist_data *node_data[];
static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
{
- int nid;
+ unsigned nid;
VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE);
nid = memnodemap[addr >> memnode_shift];
- VIRTUAL_BUG_ON(nid > maxnode);
+ VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
return nid;
}
@@ -41,9 +40,7 @@ static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
#define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
#define kvaddr_to_nid(kaddr) phys_to_nid(__pa(kaddr))
-/* AK: this currently doesn't deal with invalid addresses. We'll see
- if the 2.5 kernel doesn't pass them
- (2.4 used to). */
+/* Requires pfn_valid(pfn) to be true */
#define pfn_to_page(pfn) ({ \
int nid = phys_to_nid(((unsigned long)(pfn)) << PAGE_SHIFT); \
((pfn) - node_start_pfn(nid)) + NODE_DATA(nid)->node_mem_map; \