[PATCH] holepunch: fix mmap_sem i_mutex deadlock

[pandora-kernel.git] / mm / readahead.c

diff --git a/mm/readahead.c b/mm/readahead.c
index 23cb61a..93d9ee6 100644 (file)
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/blkdev.h>
 #include <linux/backing-dev.h>
+#include <linux/task_io_accounting_ops.h>
 #include <linux/pagevec.h>
 
 void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
@@ -148,15 +149,10 @@ int read_cache_pages(struct address_space *mapping, struct list_head *pages,
                if (!pagevec_add(&lru_pvec, page))
                        __pagevec_lru_add(&lru_pvec);
                if (ret) {
-                       while (!list_empty(pages)) {
-                               struct page *victim;
-
-                               victim = list_to_page(pages);
-                               list_del(&victim->lru);
-                               page_cache_release(victim);
-                       }
+                       put_pages_list(pages);
                        break;
                }
+               task_io_account_read(PAGE_CACHE_SIZE);
        }
        pagevec_lru_add(&lru_pvec);
        return ret;
@@ -456,7 +452,7 @@ static int make_ahead_window(struct address_space *mapping, struct file *filp,
  *
  * Note that @filp is purely used for passing on to the ->readpage[s]()
  * handler: it may refer to a different file from @mapping (so we may not use
- * @filp->f_mapping or @filp->f_dentry->d_inode here).
+ * @filp->f_mapping or @filp->f_path.dentry->d_inode here).
  * Also, @ra may not be equal to &@filp->f_ra.
  *
  */
@@ -579,10 +575,6 @@ void handle_ra_miss(struct address_space *mapping,
  */
 unsigned long max_sane_readahead(unsigned long nr)
 {
-       unsigned long active;
-       unsigned long inactive;
-       unsigned long free;
-
-       __get_zone_counts(&active, &inactive, &free, NODE_DATA(numa_node_id()));
-       return min(nr, (inactive + free) / 2);
+       return min(nr, (node_page_state(numa_node_id(), NR_INACTIVE)
+               + node_page_state(numa_node_id(), NR_FREE_PAGES)) / 2);
 }