]> nv-tegra.nvidia Code Review - linux-2.6.git/blobdiff - mm/readahead.c
[PATCH] add AOP_TRUNCATED_PAGE, prepend AOP_ to WRITEPAGE_ACTIVATE
[linux-2.6.git] / mm / readahead.c
index 72e7adbb87c7dd1e08cc1eb2851bdb96300d7e02..8d6eeaaa6296f9fb2372cff059138cbdd4b89723 100644 (file)
@@ -158,7 +158,7 @@ static int read_pages(struct address_space *mapping, struct file *filp,
 {
        unsigned page_idx;
        struct pagevec lru_pvec;
-       int ret = 0;
+       int ret;
 
        if (mapping->a_ops->readpages) {
                ret = mapping->a_ops->readpages(filp, mapping, pages, nr_pages);
@@ -171,14 +171,17 @@ static int read_pages(struct address_space *mapping, struct file *filp,
                list_del(&page->lru);
                if (!add_to_page_cache(page, mapping,
                                        page->index, GFP_KERNEL)) {
-                       mapping->a_ops->readpage(filp, page);
-                       if (!pagevec_add(&lru_pvec, page))
-                               __pagevec_lru_add(&lru_pvec);
-               } else {
-                       page_cache_release(page);
+                       ret = mapping->a_ops->readpage(filp, page);
+                       if (ret != AOP_TRUNCATED_PAGE) {
+                               if (!pagevec_add(&lru_pvec, page))
+                                       __pagevec_lru_add(&lru_pvec);
+                               continue;
+                       } /* else fall through to release */
                }
+               page_cache_release(page);
        }
        pagevec_lru_add(&lru_pvec);
+       ret = 0;
 out:
        return ret;
 }