Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6

[linux-2.6-omap-h63xx.git] / mm / internal.h

diff --git a/mm/internal.h b/mm/internal.h
index 4ebf0bef9a39f0bed64dd40e3167ae02b7891446..e4e728bdf324fc62a24ba0c951869989ab081ea1 100644 (file)
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -61,9 +61,14 @@ static inline unsigned long page_order(struct page *page)
        return page_private(page);
 }
 
-extern int mlock_vma_pages_range(struct vm_area_struct *vma,
+extern long mlock_vma_pages_range(struct vm_area_struct *vma,
                        unsigned long start, unsigned long end);
-extern void munlock_vma_pages_all(struct vm_area_struct *vma);
+extern void munlock_vma_pages_range(struct vm_area_struct *vma,
+                       unsigned long start, unsigned long end);
+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
 /*
@@ -96,7 +101,10 @@ static inline int is_mlocked_vma(struct vm_area_struct *vma, struct page *page)
        if (likely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED))
                return 0;
 
-       SetPageMlocked(page);
+       if (!TestSetPageMlocked(page)) {
+               inc_zone_page_state(page, NR_MLOCK);
+               count_vm_event(UNEVICTABLE_PGMLOCKED);
+       }
        return 1;
 }
 
@@ -123,14 +131,37 @@ static inline void clear_page_mlock(struct page *page)
 
 /*
  * mlock_migrate_page - called only from migrate_page_copy() to
- * migrate the Mlocked page flag
+ * migrate the Mlocked page flag; update statistics.
  */
 static inline void mlock_migrate_page(struct page *newpage, struct page *page)
 {
-       if (TestClearPageMlocked(page))
+       if (TestClearPageMlocked(page)) {
+               unsigned long flags;
+
+               local_irq_save(flags);
+               __dec_zone_page_state(page, NR_MLOCK);
                SetPageMlocked(newpage);
+               __inc_zone_page_state(newpage, NR_MLOCK);
+               local_irq_restore(flags);
+       }
 }
 
+/*
+ * 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 */
 static inline int is_mlocked_vma(struct vm_area_struct *v, struct page *p)
@@ -140,6 +171,7 @@ static inline int is_mlocked_vma(struct vm_area_struct *v, struct page *p)
 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 */