[PATCH 4.8 40/49] sparc64: Convert GENcopy_{from,to}_user to accurate exception reporting.

4.8-stable review patch. If anyone has any objections, please let me know. -- From: "David S. Miller" [ Upstream commit d0796b555ba60c22eb41ae39a8362156cb08eee9 ] Report the exact number of bytes which have not been successfully copied when an exception

[PATCH 4.8 40/49] sparc64: Convert GENcopy_{from,to}_user to accurate exception reporting.

4.8-stable review patch. If anyone has any objections, please let me know. -- From: "David S. Miller" [ Upstream commit d0796b555ba60c22eb41ae39a8362156cb08eee9 ] Report the exact number of bytes which have not been successfully copied when an exception occurs, using the