Update:   Same results with 4.2-rc3..    (RG  July 19)

Update:   Kernel 4.2-rc2 fails with VMware (vmnet) and NVIDIA in the same ways..     (RG July 14)

Updated to kernel 4.2-rc1 on the test system:

# uname -a 
Linux rg6830l 4.2.0-rc1 #1 SMP Sun Jul 5 18:36:06 PDT 2015 x86_64 x86_64 x86_64 GNU/Linux

/tmp/modconfig-aJnfZl/vmnet-only/bridge.c: In function ‘VNetBridgeUp’:
/tmp/modconfig-aJnfZl/vmnet-only/bridge.c:952:17: error: too few arguments to function ‘sk_alloc’
 bridge->sk = compat_sk_alloc(bridge, GFP_ATOMIC);
 ^
In file included from /tmp/modconfig-aJnfZl/vmnet-only/compat_sock.h:23:0,
 from /tmp/modconfig-aJnfZl/vmnet-only/bridge.c:35:
include/net/sock.h:1515:14: note: declared here
 struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
 ^
scripts/Makefile.build:258: recipe for target '/tmp/modconfig-aJnfZl/vmnet-only/bridge.o' failed

FATAL: modpost: GPL-incompatible module nvidia.ko uses GPL-only symbol 'flush_workqueue'
/usr/src/linux-4.2-rc1/scripts/Makefile.modpost:90: recipe for target '__modpost' failed
make[3]: *** [__modpost] Error 1
/usr/src/linux-4.2-rc1/Makefile:1383: recipe for target 'modules' failed
make[2]: *** [modules] Error 2