commit 2e039577c5eb895fab35aed136345a0c07d7a587
Author: Karel Zak <kzak@redhat.com>
Date:   Mon Jul 2 23:35:08 2007 +0200

    mount: use loop= option when mounting by /sbin/mount.<type>
    
    The mount(8) calls external mount programs (/sbin/mount.<type>)
    without the loop=/dev/loopN option. This patch fix this bug.
    
    Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/mount/mount.c b/mount/mount.c
index c27c5e5..50089a9 100644
--- a/mount/mount.c
+++ b/mount/mount.c
@@ -1057,6 +1057,9 @@ try_mount_one (const char *spec0, const char *node0, const char *types0,
 	  goto out;
   }
 
+  if (loop)
+      opt_loopdev = loopdev;
+
   /*
    * Call mount.TYPE for types that require a separate mount program.
    * For the moment these types are ncpfs and smbfs. Maybe also vxfs.
@@ -1082,8 +1085,6 @@ try_mount_one (const char *spec0, const char *node0, const char *types0,
 
   if (fake || mnt5_res == 0) {
       /* Mount succeeded, report this (if verbose) and write mtab entry.  */
-      if (loop)
-	  opt_loopdev = loopdev;
 
       if (!(mounttype & MS_PROPAGATION)) {
 	      update_mtab_entry(loop ? loopfile : spec,