[PATCH] filemap_getpage can block when MAP_NONBLOCK specified
[linux-3.10.git] / mm / filemap.c
index 439b2bea8e34211a8da7f800d66f2a4ce9d674c9..93595c327bbdc43fcea91b513fd750d1a73edfec 100644 (file)
@@ -1379,8 +1379,13 @@ retry_find:
         * Ok, found a page in the page cache, now we need to check
         * that it's up-to-date.
         */
-       if (!PageUptodate(page))
+       if (!PageUptodate(page)) {
+               if (nonblock) {
+                       page_cache_release(page);
+                       return NULL;
+               }
                goto page_not_uptodate;
+       }
 
 success:
        /*