From 161599ff39a3c3cdea0a1be05ac53accd2c45cdd Mon Sep 17 00:00:00 2001 From: Andy Whitcroft Date: Fri, 6 Jan 2006 00:10:54 -0800 Subject: [PATCH] [PATCH] sparsemem: provide pfn_to_nid Before SPARSEMEM is initialised we cannot provide an efficient pfn_to_nid() implmentation; before initialisation is complete we use early_pfn_to_nid() to provide location information. Until recently there was no non-init user of this functionality. Provide a post init pfn_to_nid() implementation. Note that this implmentation assumes that the pfn passed has been validated with pfn_valid(). The current single user of this function already has this check. Signed-off-by: Andy Whitcroft Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mmzone.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index ee9f7b7..8cba76c 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -596,7 +596,11 @@ static inline int pfn_valid(unsigned long pfn) * this restriction. */ #ifdef CONFIG_NUMA -#define pfn_to_nid early_pfn_to_nid +#define pfn_to_nid(pfn) \ +({ \ + unsigned long __pfn_to_nid_pfn = (pfn); \ + page_to_nid(pfn_to_page(__pfn_to_nid_pfn)); \ +}) #else #define pfn_to_nid(pfn) (0) #endif -- 2.7.4