IB/ipath: Use unsigned long for irq flags

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / mm / readahead.c

diff --git a/mm/readahead.c b/mm/readahead.c
index c9c50ca1ec3866b839a85173f3d416a1b17211d1..77e8ddf945e9a725d4b675923124f4eafd0924e2 100644 (file)
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -235,7 +235,13 @@ unsigned long max_sane_readahead(unsigned long nr)
 
 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;
@@ -443,9 +449,10 @@ EXPORT_SYMBOL_GPL(page_cache_sync_readahead);
  *            pagecache pages
  *
  * page_cache_async_ondemand() should be called when a page is used which
- * has the PG_readahead flag: this is a marker to suggest that the application
+ * has the PG_readahead flag; this is a marker to suggest that the application
  * has used up enough of the readahead window that we should start pulling in
- * more pages. */
+ * more pages.
+ */
 void
 page_cache_async_readahead(struct address_space *mapping,
                           struct file_ra_state *ra, struct file *filp,