Fungus on Cherry Bark. 11.15.15

Fungus on Cherry Tree.  11.15.15

I don't know what this is.  It's on the North side of an approx 6 year old Almaden Duke cherry tree.

The tree has never amounted to much.  If it dies, it's not that much of a loss.  There are 2 suckers from the rootstock.  They could be grafted to start a new tree on the same roots.  Assuming the fungus is localized.

These mushrooms are on the North side of the trunk.  There are none on the South side.