diff options
Diffstat (limited to 'include/linux/page_ext.h')
| -rw-r--r-- | include/linux/page_ext.h | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/include/linux/page_ext.h b/include/linux/page_ext.h index fabb2e1e087f..22be4582faae 100644 --- a/include/linux/page_ext.h +++ b/include/linux/page_ext.h @@ -36,9 +36,15 @@ struct page_ext { unsigned long flags; }; +extern bool early_page_ext; extern unsigned long page_ext_size; extern void pgdat_page_ext_init(struct pglist_data *pgdat); +static inline bool early_page_ext_enabled(void) +{ + return early_page_ext; +} + #ifdef CONFIG_SPARSEMEM static inline void page_ext_init_flatmem(void) { @@ -55,7 +61,8 @@ static inline void page_ext_init(void) } #endif -struct page_ext *lookup_page_ext(const struct page *page); +extern struct page_ext *page_ext_get(struct page *page); +extern void page_ext_put(struct page_ext *page_ext); static inline struct page_ext *page_ext_next(struct page_ext *curr) { @@ -67,13 +74,13 @@ static inline struct page_ext *page_ext_next(struct page_ext *curr) #else /* !CONFIG_PAGE_EXTENSION */ struct page_ext; -static inline void pgdat_page_ext_init(struct pglist_data *pgdat) +static inline bool early_page_ext_enabled(void) { + return false; } -static inline struct page_ext *lookup_page_ext(const struct page *page) +static inline void pgdat_page_ext_init(struct pglist_data *pgdat) { - return NULL; } static inline void page_ext_init(void) @@ -87,5 +94,14 @@ static inline void page_ext_init_flatmem_late(void) static inline void page_ext_init_flatmem(void) { } + +static inline struct page_ext *page_ext_get(struct page *page) +{ + return NULL; +} + +static inline void page_ext_put(struct page_ext *page_ext) +{ +} #endif /* CONFIG_PAGE_EXTENSION */ #endif /* __LINUX_PAGE_EXT_H */ |