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[PATCH] x86_64: Fix up outdated pfn_to_page comment
pfn_to_page really requires pfn_valid to be true now, no question. Some people stumbled over it, but it was misleading and wrong. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -41,9 +41,7 @@ static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
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#define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
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#define kvaddr_to_nid(kaddr) phys_to_nid(__pa(kaddr))
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/* AK: this currently doesn't deal with invalid addresses. We'll see
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if the 2.5 kernel doesn't pass them
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(2.4 used to). */
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/* Requires pfn_valid(pfn) to be true */
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#define pfn_to_page(pfn) ({ \
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int nid = phys_to_nid(((unsigned long)(pfn)) << PAGE_SHIFT); \
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((pfn) - node_start_pfn(nid)) + NODE_DATA(nid)->node_mem_map; \
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