tree 377d00ead5f35432e0347f3010d92bb31bdb3ef5
parent 45713203f5c37be3ff83be4d4c594628ed817fb7
author Barret Rhoden <brho@cs.berkeley.edu> 1568399167 -0400
committer Barret Rhoden <brho@cs.berkeley.edu> 1570569070 -0400

Add overflow.h from Linux

v5.2.

Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>