generic_file_write change in 2.4.0-ac8

[Chris Mason]

Hi guys,

This code for generic_file_write calls vmtruncate without i_sem held.  Is
that intentional?  It should cause problems for reiserfs at least...

-chris

diff -u --new-file --recursive --exclude-from /usr/src/exclude
linux-2.4.0/mm/filemap.c linux.ac/mm/filemap.c
--- linux-2.4.0/mm/filemap.c	Wed Jan  3 02:59:45 2001
+++ linux.ac/mm/filemap.c	Thu Jan 11 17:26:55 2001
@@ -2578,6 +2625,13 @@
 	ClearPageUptodate(page);
 	kunmap(page);
 	goto unlock;
+sync_failure:
+	UnlockPage(page);
+	deactivate_page(page);
+	page_cache_release(page);
+	if (pos + bytes > inode->i_size)
+		vmtruncate(inode, inode->i_size);
+	goto done;
 }