X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=mm%2Freadahead.c;h=bec83c15a78f61b58a1dfbb74a336b9848b5d876;hb=153f82207c51193e4d6a7e6f0e3f9442eabeba1c;hp=8762e8988972baa01820369ba1fd46d7e727d215;hpb=f7850d932fc69cb4bad83117f0bef1a658cce350;p=safe%2Fjmp%2Flinux-2.6

diff --git a/mm/readahead.c b/mm/readahead.c
index 8762e89..bec83c1 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2002, Linus Torvalds
  *
- * 09Apr2002	akpm@zip.com.au
+ * 09Apr2002	Andrew Morton
  *		Initial version.
  */
 
@@ -229,13 +229,19 @@ int do_page_cache_readahead(struct address_space *mapping, struct file *filp,
  */
 unsigned long max_sane_readahead(unsigned long nr)
 {
-	return min(nr, (node_page_state(numa_node_id(), NR_INACTIVE)
+	return min(nr, (node_page_state(numa_node_id(), NR_INACTIVE_FILE)
 		+ node_page_state(numa_node_id(), NR_FREE_PAGES)) / 2);
 }
 
 static int __init readahead_init(void)
 {
-	return bdi_init(&default_backing_dev_info);
+	int err;
+
+	err = bdi_init(&default_backing_dev_info);
+	if (!err)
+		bdi_register(&default_backing_dev_info, NULL, "default");
+
+	return err;
 }
 subsys_initcall(readahead_init);
 
@@ -376,9 +382,9 @@ ondemand_readahead(struct address_space *mapping,
 	if (hit_readahead_marker) {
 		pgoff_t start;
 
-		read_lock_irq(&mapping->tree_lock);
-		start = radix_tree_next_hole(&mapping->page_tree, offset, max+1);
-		read_unlock_irq(&mapping->tree_lock);
+		rcu_read_lock();
+		start = radix_tree_next_hole(&mapping->page_tree, offset,max+1);
+		rcu_read_unlock();
 
 		if (!start || start - offset > max)
 			return 0;