[PATCH] mm: tracking shared dirty pages

[linux-2.6-microblaze.git] / include / linux / rmap.h

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index d6b9bcd..db2c1df 100644 (file)
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -4,7 +4,6 @@
  * Declarations for Reverse Mapping functions in mm/rmap.c
  */
 
-#include <linux/config.h>
 #include <linux/list.h>
 #include <linux/slab.h>
 #include <linux/mm.h>
@@ -92,7 +91,6 @@ static inline void page_dup_rmap(struct page *page)
  */
 int page_referenced(struct page *, int is_locked);
 int try_to_unmap(struct page *, int ignore_refs);
-void remove_from_swap(struct page *page);
 
 /*
  * Called from mm/filemap_xip.c to unmap empty zero page
@@ -105,6 +103,14 @@ pte_t *page_check_address(struct page *, struct mm_struct *,
  */
 unsigned long page_address_in_vma(struct page *, struct vm_area_struct *);
 
+/*
+ * Cleans the PTEs of shared mappings.
+ * (and since clean PTEs should also be readonly, write protects them too)
+ *
+ * returns the number of cleaned PTEs.
+ */
+int page_mkclean(struct page *);
+
 #else  /* !CONFIG_MMU */
 
 #define anon_vma_init()                do {} while (0)
@@ -114,6 +120,12 @@ unsigned long page_address_in_vma(struct page *, struct vm_area_struct *);
 #define page_referenced(page,l) TestClearPageReferenced(page)
 #define try_to_unmap(page, refs) SWAP_FAIL
 
+static inline int page_mkclean(struct page *page)
+{
+       return 0;
+}
+
+
 #endif /* CONFIG_MMU */
 
 /*