diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 32 |
1 files changed, 2 insertions, 30 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 9dfbe6b7d1c8b..5af33186a25fe 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2879,42 +2879,14 @@ void *__init alloc_large_system_hash(const char *tablename, } #ifdef CONFIG_OUT_OF_LINE_PFN_TO_PAGE -/* - * pfn <-> page translation. out-of-line version. - * (see asm-generic/memory_model.h) - */ -#if defined(CONFIG_FLATMEM) -struct page *pfn_to_page(unsigned long pfn) -{ - return mem_map + (pfn - ARCH_PFN_OFFSET); -} -unsigned long page_to_pfn(struct page *page) -{ - return (page - mem_map) + ARCH_PFN_OFFSET; -} -#elif defined(CONFIG_DISCONTIGMEM) struct page *pfn_to_page(unsigned long pfn) { - int nid = arch_pfn_to_nid(pfn); - return NODE_DATA(nid)->node_mem_map + arch_local_page_offset(pfn,nid); + return __pfn_to_page(pfn); } unsigned long page_to_pfn(struct page *page) { - struct pglist_data *pgdat = NODE_DATA(page_to_nid(page)); - return (page - pgdat->node_mem_map) + pgdat->node_start_pfn; -} -#elif defined(CONFIG_SPARSEMEM) -struct page *pfn_to_page(unsigned long pfn) -{ - return __section_mem_map_addr(__pfn_to_section(pfn)) + pfn; -} - -unsigned long page_to_pfn(struct page *page) -{ - long section_id = page_to_section(page); - return page - __section_mem_map_addr(__nr_to_section(section_id)); + return __page_to_pfn(page); } -#endif /* CONFIG_FLATMEM/DISCONTIGMME/SPARSEMEM */ EXPORT_SYMBOL(pfn_to_page); EXPORT_SYMBOL(page_to_pfn); #endif /* CONFIG_OUT_OF_LINE_PFN_TO_PAGE */ |