I painted a wall last night with Behr Eggshell finish paint. I notice this morning a spot that the roller did not fully cover...there is a slight crown in the drywall and a small area was not hit hard enough with paint. It is not very noticeable but I know its there.

Can I just load up my roller and hit the spot or must I now repaint the whole wall.

I do not want to get a roller swoosh mark! Is there a technique to cover the area missed?