[PATCH] mm/slab.c: fix early init assumption

[linux-2.6] / mm / filemap.c

diff --git a/mm/filemap.c b/mm/filemap.c
index 3ef20739e7252232c5822cbeed6e22eaa5247d0c..3342067ca436e33a8399664a35c7265986272427 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -190,8 +190,8 @@ int __filemap_fdatawrite_range(struct address_space *mapping, loff_t start,
        struct writeback_control wbc = {
                .sync_mode = sync_mode,
                .nr_to_write = mapping->nrpages * 2,
-               .start = start,
-               .end = end,
+               .range_start = start,
+               .range_end = end,
        };
 
        if (!mapping_cap_writeback_dirty(mapping))
@@ -204,7 +204,7 @@ int __filemap_fdatawrite_range(struct address_space *mapping, loff_t start,
 static inline int __filemap_fdatawrite(struct address_space *mapping,
        int sync_mode)
 {
-       return __filemap_fdatawrite_range(mapping, 0, 0, sync_mode);
+       return __filemap_fdatawrite_range(mapping, 0, LLONG_MAX, sync_mode);
 }
 
 int filemap_fdatawrite(struct address_space *mapping)
@@ -697,6 +697,38 @@ unsigned find_get_pages(struct address_space *mapping, pgoff_t start,
        return ret;
 }
 
+/**
+ * find_get_pages_contig - gang contiguous pagecache lookup
+ * @mapping:   The address_space to search
+ * @index:     The starting page index
+ * @nr_pages:  The maximum number of pages
+ * @pages:     Where the resulting pages are placed
+ *
+ * find_get_pages_contig() works exactly like find_get_pages(), except
+ * that the returned number of pages are guaranteed to be contiguous.
+ *
+ * find_get_pages_contig() returns the number of pages which were found.
+ */
+unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t index,
+                              unsigned int nr_pages, struct page **pages)
+{
+       unsigned int i;
+       unsigned int ret;
+
+       read_lock_irq(&mapping->tree_lock);
+       ret = radix_tree_gang_lookup(&mapping->page_tree,
+                               (void **)pages, index, nr_pages);
+       for (i = 0; i < ret; i++) {
+               if (pages[i]->mapping == NULL || pages[i]->index != index)
+                       break;
+
+               page_cache_get(pages[i]);
+               index++;
+       }
+       read_unlock_irq(&mapping->tree_lock);
+       return i;
+}
+
 /*
  * Like find_get_pages, except we only return pages which are tagged with
  * `tag'.   We update *index to index the next page for the traversal.