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-rw-r--r--mm/filemap.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index c11418d..8861192 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -54,9 +54,8 @@
*
* ->i_mmap_lock (vmtruncate)
* ->private_lock (__free_pte->__set_page_dirty_buffers)
- * ->swap_list_lock
- * ->swap_device_lock (exclusive_swap_page, others)
- * ->mapping->tree_lock
+ * ->swap_lock (exclusive_swap_page, others)
+ * ->mapping->tree_lock
*
* ->i_sem
* ->i_mmap_lock (truncate->unmap_mapping_range)
@@ -86,7 +85,7 @@
* ->page_table_lock (anon_vma_prepare and various)
*
* ->page_table_lock
- * ->swap_device_lock (try_to_unmap_one)
+ * ->swap_lock (try_to_unmap_one)
* ->private_lock (try_to_unmap_one)
* ->tree_lock (try_to_unmap_one)
* ->zone.lru_lock (follow_page->mark_page_accessed)
@@ -1505,8 +1504,12 @@ repeat:
return -EINVAL;
page = filemap_getpage(file, pgoff, nonblock);
+
+ /* XXX: This is wrong, a filesystem I/O error may have happened. Fix that as
+ * done in shmem_populate calling shmem_getpage */
if (!page && !nonblock)
return -ENOMEM;
+
if (page) {
err = install_page(mm, vma, addr, page, prot);
if (err) {
@@ -1514,6 +1517,9 @@ repeat:
return err;
}
} else {
+ /* No page was found just because we can't read it in now (being
+ * here implies nonblock != 0), but the page may exist, so set
+ * the PTE to fault it in later. */
err = install_file_pte(mm, vma, addr, pgoff, prot);
if (err)
return err;
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