[PATCH 4/7] unionfs: fix unionfs_create and unionfs_setattr to handle ATTR_KILL_S*ID

Don't allow either function to trip the BUG() in notify_change. For unionfs_setattr, clear ATTR_MODE if the either ATTR_KILL_S*ID is set. This also allows the lower filesystem to interpret these bits in its own way. unionfs_create is setting the mode explicitly already, so don't set

[PATCH 4/7] unionfs: fix unionfs_create and unionfs_setattr to handle ATTR_KILL_S*ID

Don't allow either function to trip the BUG() in notify_change. For unionfs_setattr, clear ATTR_MODE if the either ATTR_KILL_S*ID is set. unionfs_create is setting the mode explicitly already. Don't set ATTR_KILL_S*ID. Just fix up the mode to have the same effect. Also, move locking the i_mutex