tree 7ba31e8afc0514062f3ba59c9b538a75a121fb1f
parent ae0dff683076b2798763288c7ac2f09a18c4a998
author Tao Ma <tao.ma@oracle.com> 1223283595 +0800
committer Mark Fasheh <mfasheh@suse.com> 1226339507 -0800

ocfs2: return 0 in page_mkwrite to let VFS retry.

In ocfs2_page_mkwrite, we return -EINVAL when we found the page mapping
isn't updated, and it will cause the user space program get SIGBUS and
exit. The reason is that during race writeable mmap, we will do
unmap_mapping_range in ocfs2_data_downconvert_worker. The good thing is
that if we reuturn 0 in page_mkwrite, VFS will retry fault and then
call page_mkwrite again, so it is safe to return 0 here.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>