diff options
Diffstat (limited to 'mm/page_ext.c')
| -rw-r--r-- | mm/page_ext.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/page_ext.c b/mm/page_ext.c index 641d93f6af4c..c351fdfe9e9a 100644 --- a/mm/page_ext.c +++ b/mm/page_ext.c @@ -508,6 +508,19 @@ void __meminit pgdat_page_ext_init(struct pglist_data *pgdat) #endif /** + * page_ext_lookup() - Lookup a page extension for a PFN. + * @pfn: PFN of the page we're interested in. + * + * Must be called with RCU read lock taken and @pfn must be valid. + * + * Return: NULL if no page_ext exists for this page. + */ +struct page_ext *page_ext_lookup(unsigned long pfn) +{ + return lookup_page_ext(pfn_to_page(pfn)); +} + +/** * page_ext_get() - Get the extended information for a page. * @page: The page we're interested in. * |