diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/mm.h | 41 |
1 files changed, 22 insertions, 19 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 7ff54242c5d7..df80e63903b5 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h | |||
@@ -223,24 +223,27 @@ struct page { | |||
223 | * & limit reverse map searches. | 223 | * & limit reverse map searches. |
224 | */ | 224 | */ |
225 | union { | 225 | union { |
226 | unsigned long private; /* Mapping-private opaque data: | 226 | struct { |
227 | * usually used for buffer_heads | 227 | unsigned long private; /* Mapping-private opaque data: |
228 | * if PagePrivate set; used for | 228 | * usually used for buffer_heads |
229 | * swp_entry_t if PageSwapCache | 229 | * if PagePrivate set; used for |
230 | * When page is free, this indicates | 230 | * swp_entry_t if PageSwapCache. |
231 | * order in the buddy system. | 231 | * When page is free, this |
232 | */ | 232 | * indicates order in the buddy |
233 | * system. | ||
234 | */ | ||
235 | struct address_space *mapping; /* If low bit clear, points to | ||
236 | * inode address_space, or NULL. | ||
237 | * If page mapped as anonymous | ||
238 | * memory, low bit is set, and | ||
239 | * it points to anon_vma object: | ||
240 | * see PAGE_MAPPING_ANON below. | ||
241 | */ | ||
242 | }; | ||
233 | #if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS | 243 | #if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS |
234 | spinlock_t ptl; | 244 | spinlock_t ptl; |
235 | #endif | 245 | #endif |
236 | } u; | 246 | }; |
237 | struct address_space *mapping; /* If low bit clear, points to | ||
238 | * inode address_space, or NULL. | ||
239 | * If page mapped as anonymous | ||
240 | * memory, low bit is set, and | ||
241 | * it points to anon_vma object: | ||
242 | * see PAGE_MAPPING_ANON below. | ||
243 | */ | ||
244 | pgoff_t index; /* Our offset within mapping. */ | 247 | pgoff_t index; /* Our offset within mapping. */ |
245 | struct list_head lru; /* Pageout list, eg. active_list | 248 | struct list_head lru; /* Pageout list, eg. active_list |
246 | * protected by zone->lru_lock ! | 249 | * protected by zone->lru_lock ! |
@@ -261,8 +264,8 @@ struct page { | |||
261 | #endif /* WANT_PAGE_VIRTUAL */ | 264 | #endif /* WANT_PAGE_VIRTUAL */ |
262 | }; | 265 | }; |
263 | 266 | ||
264 | #define page_private(page) ((page)->u.private) | 267 | #define page_private(page) ((page)->private) |
265 | #define set_page_private(page, v) ((page)->u.private = (v)) | 268 | #define set_page_private(page, v) ((page)->private = (v)) |
266 | 269 | ||
267 | /* | 270 | /* |
268 | * FIXME: take this include out, include page-flags.h in | 271 | * FIXME: take this include out, include page-flags.h in |
@@ -815,7 +818,7 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a | |||
815 | * overflow into the next struct page (as it might with DEBUG_SPINLOCK). | 818 | * overflow into the next struct page (as it might with DEBUG_SPINLOCK). |
816 | * When freeing, reset page->mapping so free_pages_check won't complain. | 819 | * When freeing, reset page->mapping so free_pages_check won't complain. |
817 | */ | 820 | */ |
818 | #define __pte_lockptr(page) &((page)->u.ptl) | 821 | #define __pte_lockptr(page) &((page)->ptl) |
819 | #define pte_lock_init(_page) do { \ | 822 | #define pte_lock_init(_page) do { \ |
820 | spin_lock_init(__pte_lockptr(_page)); \ | 823 | spin_lock_init(__pte_lockptr(_page)); \ |
821 | } while (0) | 824 | } while (0) |