kill spurious reference to vmtruncate

Lots of filesystems calls vmtruncate despite not implementing the old
->truncate method.  Switch them to use simple_setsize and add some
comments about the truncate code where it seems fitting.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 7 insertions, 1 deletions

diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index a739a0a48067..9f8b52500d63 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -700,8 +700,14 @@ out:
                 return 0;
 
         page_cache_release(page);
+
+        /*
+         * XXX(hch): the call below should probably be replaced with
+         * a call to the gfs2-specific truncate blocks helper to actually
+         * release disk blocks..
+         */
         if (pos + len > ip->i_inode.i_size)
-                vmtruncate(&ip->i_inode, ip->i_inode.i_size);
+                simple_setsize(&ip->i_inode, ip->i_inode.i_size);
 out_endtrans:
         gfs2_trans_end(sdp);
 out_trans_fail: