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authorAndi Kleen <ak@suse.de>2005-11-05 17:25:53 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-14 19:55:13 -0800
commit1dff7f3db5f045ccbfeca5bb00b0958a78501557 (patch)
treef4bf00e22827bd586a5fa3939b660039a3c5b199 /include/asm-x86_64
parent6004e1b7effcbb385a6b7c790e4b8008682cf679 (diff)
[PATCH] x86_64: Fix up outdated pfn_to_page comment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>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/mmzone.h4
1 files changed, 1 insertions, 3 deletions
diff --git a/include/asm-x86_64/mmzone.h b/include/asm-x86_64/mmzone.h
index b40c661f111..8d48dc7e43a 100644
--- a/include/asm-x86_64/mmzone.h
+++ b/include/asm-x86_64/mmzone.h
@@ -41,9 +41,7 @@ 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; \