void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
unsigned long floor, unsigned long ceiling);
-extern void prep_compound_page(struct page *page, unsigned long order);
-extern void prep_compound_gigantic_page(struct page *page, unsigned long order);
-
static inline void set_page_count(struct page *page, int v)
{
atomic_set(&page->_count, v);
atomic_dec(&page->_count);
}
+static inline void __get_page_tail_foll(struct page *page,
+ bool get_page_head)
+{
+ /*
+ * If we're getting a tail page, the elevated page->_count is
+ * required only in the head page and we will elevate the head
+ * page->_count and tail page->_mapcount.
+ *
+ * We elevate page_tail->_mapcount for tail pages to force
+ * page_tail->_count to be zero at all times to avoid getting
+ * false positives from get_page_unless_zero() with
+ * speculative page access (like in
+ * page_cache_get_speculative()) on tail pages.
+ */
+ VM_BUG_ON(atomic_read(&page->first_page->_count) <= 0);
+ VM_BUG_ON(atomic_read(&page->_count) != 0);
+ VM_BUG_ON(page_mapcount(page) < 0);
+ if (get_page_head)
+ atomic_inc(&page->first_page->_count);
+ atomic_inc(&page->_mapcount);
+}
+
+/*
+ * This is meant to be called as the FOLL_GET operation of
+ * follow_page() and it must be called while holding the proper PT
+ * lock while the pte (or pmd_trans_huge) is still mapping the page.
+ */
+static inline void get_page_foll(struct page *page)
+{
+ if (unlikely(PageTail(page)))
+ /*
+ * This is safe only because
+ * __split_huge_page_refcount() can't run under
+ * get_page_foll() because we hold the proper PT lock.
+ */
+ __get_page_tail_foll(page, true);
+ else {
+ /*
+ * Getting a normal page or the head of a compound page
+ * requires to already have an elevated page->_count.
+ */
+ VM_BUG_ON(atomic_read(&page->_count) <= 0);
+ atomic_inc(&page->_count);
+ }
+}
+
+extern unsigned long highest_memmap_pfn;
+
/*
* in mm/vmscan.c:
*/
/*
* in mm/page_alloc.c
*/
-extern unsigned long highest_memmap_pfn;
extern void __free_pages_bootmem(struct page *page, unsigned int order);
+extern void prep_compound_page(struct page *page, unsigned long order);
+#ifdef CONFIG_MEMORY_FAILURE
+extern bool is_free_buddy_page(struct page *page);
+#endif
+
/*
* function for dealing with page's order in buddy system.
*/
static inline unsigned long page_order(struct page *page)
{
- VM_BUG_ON(!PageBuddy(page));
+ /* PageBuddy() must be checked by the caller */
return page_private(page);
}
+/* mm/util.c */
+void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
+ struct vm_area_struct *prev, struct rb_node *rb_parent);
+
+#ifdef CONFIG_MMU
extern long mlock_vma_pages_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
extern void munlock_vma_pages_range(struct vm_area_struct *vma,
munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
}
-#ifdef CONFIG_UNEVICTABLE_LRU
-/*
- * unevictable_migrate_page() called only from migrate_page_copy() to
- * migrate unevictable flag to new page.
- * Note that the old page has been isolated from the LRU lists at this
- * point so we don't need to worry about LRU statistics.
- */
-static inline void unevictable_migrate_page(struct page *new, struct page *old)
-{
- if (TestClearPageUnevictable(old))
- SetPageUnevictable(new);
-}
-#else
-static inline void unevictable_migrate_page(struct page *new, struct page *old)
-{
-}
-#endif
-
-#ifdef CONFIG_UNEVICTABLE_LRU
/*
* Called only in fault path via page_evictable() for a new page
* to determine if it's being mapped into a LOCKED vma.
}
/*
- * must be called with vma's mmap_sem held for read, and page locked.
+ * must be called with vma's mmap_sem held for read or write, and page locked.
*/
extern void mlock_vma_page(struct page *page);
+extern void munlock_vma_page(struct page *page);
/*
* Clear the page's PageMlocked(). This can be useful in a situation where
}
}
-/*
- * free_page_mlock() -- clean up attempts to free and mlocked() page.
- * Page should not be on lru, so no need to fix that up.
- * free_pages_check() will verify...
- */
-static inline void free_page_mlock(struct page *page)
-{
- if (unlikely(TestClearPageMlocked(page))) {
- unsigned long flags;
-
- local_irq_save(flags);
- __dec_zone_page_state(page, NR_MLOCK);
- __count_vm_event(UNEVICTABLE_MLOCKFREED);
- local_irq_restore(flags);
- }
-}
-
-#else /* CONFIG_UNEVICTABLE_LRU */
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+extern unsigned long vma_address(struct page *page,
+ struct vm_area_struct *vma);
+#endif
+#else /* !CONFIG_MMU */
static inline int is_mlocked_vma(struct vm_area_struct *v, struct page *p)
{
return 0;
static inline void clear_page_mlock(struct page *page) { }
static inline void mlock_vma_page(struct page *page) { }
static inline void mlock_migrate_page(struct page *new, struct page *old) { }
-static inline void free_page_mlock(struct page *page) { }
-#endif /* CONFIG_UNEVICTABLE_LRU */
+#endif /* !CONFIG_MMU */
/*
* Return the mem_map entry representing the 'offset' subpage within
}
/*
- * Iterator over all subpages withing the maximally aligned gigantic
+ * Iterator over all subpages within the maximally aligned gigantic
* page 'base'. Handle any discontiguity in the mem_map.
*/
static inline struct page *mem_map_next(struct page *iter,
}
#endif /* CONFIG_SPARSEMEM */
-#define GUP_FLAGS_WRITE 0x1
-#define GUP_FLAGS_FORCE 0x2
-#define GUP_FLAGS_IGNORE_VMA_PERMISSIONS 0x4
+#define ZONE_RECLAIM_NOSCAN -2
+#define ZONE_RECLAIM_FULL -1
+#define ZONE_RECLAIM_SOME 0
+#define ZONE_RECLAIM_SUCCESS 1
+#endif
-int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
- unsigned long start, int len, int flags,
- struct page **pages, struct vm_area_struct **vmas);
+extern int hwpoison_filter(struct page *p);
-#endif
+extern u32 hwpoison_filter_dev_major;
+extern u32 hwpoison_filter_dev_minor;
+extern u64 hwpoison_filter_flags_mask;
+extern u64 hwpoison_filter_flags_value;
+extern u64 hwpoison_filter_memcg;
+extern u32 hwpoison_filter_enable;
projects / linux-flexiantxendom0-3.2.10.git / blobdiff