nfsd: 4.1 has an rfc number

[safe/jmp/linux-2.6] / mm / internal.h

diff --git a/mm/internal.h b/mm/internal.h
index 1cfbf2e..6a697bb 100644 (file)
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -16,8 +16,6 @@
 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);
-
 static inline void set_page_count(struct page *page, int v)
 {
        atomic_set(&page->_count, v);
@@ -39,6 +37,8 @@ static inline void __put_page(struct page *page)
        atomic_dec(&page->_count);
 }
 
+extern unsigned long highest_memmap_pfn;
+
 /*
  * in mm/vmscan.c:
  */
@@ -49,6 +49,11 @@ extern void putback_lru_page(struct page *page);
  * in mm/page_alloc.c
  */
 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.
@@ -61,6 +66,7 @@ static inline unsigned long page_order(struct page *page)
        return page_private(page);
 }
 
+#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,
@@ -70,25 +76,6 @@ static inline void munlock_vma_pages_all(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.
@@ -109,9 +96,10 @@ static inline int is_mlocked_vma(struct vm_area_struct *vma, struct page *page)
 }
 
 /*
- * 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
@@ -146,8 +134,7 @@ static inline void mlock_migrate_page(struct page *newpage, struct page *page)
        }
 }
 
-
-#else /* CONFIG_UNEVICTABLE_LRU */
+#else /* !CONFIG_MMU */
 static inline int is_mlocked_vma(struct vm_area_struct *v, struct page *p)
 {
        return 0;
@@ -156,7 +143,35 @@ 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) { }
 
-#endif /* CONFIG_UNEVICTABLE_LRU */
+#endif /* !CONFIG_MMU */
+
+/*
+ * Return the mem_map entry representing the 'offset' subpage within
+ * the maximally aligned gigantic page 'base'.  Handle any discontiguity
+ * in the mem_map at MAX_ORDER_NR_PAGES boundaries.
+ */
+static inline struct page *mem_map_offset(struct page *base, int offset)
+{
+       if (unlikely(offset >= MAX_ORDER_NR_PAGES))
+               return pfn_to_page(page_to_pfn(base) + offset);
+       return base + offset;
+}
+
+/*
+ * Iterator over all subpages withing the maximally aligned gigantic
+ * page 'base'.  Handle any discontiguity in the mem_map.
+ */
+static inline struct page *mem_map_next(struct page *iter,
+                                               struct page *base, int offset)
+{
+       if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
+               unsigned long pfn = page_to_pfn(base) + offset;
+               if (!pfn_valid(pfn))
+                       return NULL;
+               return pfn_to_page(pfn);
+       }
+       return iter + 1;
+}
 
 /*
  * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
@@ -226,12 +241,21 @@ static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
 }
 #endif /* CONFIG_SPARSEMEM */
 
-#define GUP_FLAGS_WRITE                  0x1
-#define GUP_FLAGS_FORCE                  0x2
-#define GUP_FLAGS_IGNORE_VMA_PERMISSIONS 0x4
-
 int __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
-                    unsigned long start, int len, int flags,
+                    unsigned long start, int len, unsigned int foll_flags,
                     struct page **pages, struct vm_area_struct **vmas);
 
+#define ZONE_RECLAIM_NOSCAN    -2
+#define ZONE_RECLAIM_FULL      -1
+#define ZONE_RECLAIM_SOME      0
+#define ZONE_RECLAIM_SUCCESS   1
 #endif
+
+extern int hwpoison_filter(struct page *p);
+
+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;