Messages in this thread Patch in this message | | | Date | Tue, 22 Nov 2005 18:07:44 +0000 | Subject | [PATCH 2/2] sparse provide pfn_to_nid | From | Andy Whitcroft <> |
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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 <apw@shadowen.org> --- mmzone.h | 6 +++++- 1 files changed, 5 insertions(+), 1 deletion(-) diff -upN reference/include/linux/mmzone.h current/include/linux/mmzone.h --- reference/include/linux/mmzone.h +++ current/include/linux/mmzone.h @@ -606,7 +606,11 @@ static inline int pfn_valid(unsigned lon * 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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