do_generic_file_read: clear page errors when issuing a fresh read of the page

[safe/jmp/linux-2.6] / mm / filemap.c

diff --git a/mm/filemap.c b/mm/filemap.c
index d6f4f07..35e12d1 100644 (file)
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -461,9 +461,15 @@ EXPORT_SYMBOL_GPL(add_to_page_cache_lru);
 #ifdef CONFIG_NUMA
 struct page *__page_cache_alloc(gfp_t gfp)
 {
+       int n;
+       struct page *page;
+
        if (cpuset_do_page_mem_spread()) {
-               int n = cpuset_mem_spread_node();
-               return alloc_pages_exact_node(n, gfp, 0);
+               get_mems_allowed();
+               n = cpuset_mem_spread_node();
+               page = alloc_pages_exact_node(n, gfp, 0);
+               put_mems_allowed();
+               return page;
        }
        return alloc_pages(gfp, 0);
 }
@@ -1099,6 +1105,12 @@ page_not_up_to_date_locked:
                }
 
 readpage:
+               /*
+                * A previous I/O error may have been due to temporary
+                * failures, eg. multipath errors.
+                * PG_error will be set again if readpage fails.
+                */
+               ClearPageError(page);
                /* Start the actual read. The read will unlock the page. */
                error = mapping->a_ops->readpage(filp, page);