Messages in this thread Patch in this message | | | Date | Wed, 16 Nov 2005 23:00:23 +0000 | Subject | [PATCH 3/3] 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 | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff -upN reference/include/linux/mmzone.h current/include/linux/mmzone.h --- reference/include/linux/mmzone.h +++ current/include/linux/mmzone.h @@ -598,14 +598,11 @@ static inline int pfn_valid(unsigned lon return valid_section(__nr_to_section(pfn_to_section_nr(pfn))); } -/* - * These are _only_ used during initialisation, therefore they - * can use __initdata ... They could have names to indicate - * this restriction. - */ -#ifdef CONFIG_NUMA -#define pfn_to_nid early_pfn_to_nid -#endif +#define pfn_to_nid(pfn) \ +({ \ + unsigned long __pfn = (pfn); \ + page_to_nid(pfn_to_page(pfn)); \ +}) #define early_pfn_valid(pfn) pfn_valid(pfn) void sparse_init(void); - 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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