DKMS make.log for psmouse-elantech-x551c for kernel 4.2.0-040200rc4-generic (x86_64)
Sun Aug  2 12:22:14 EDT 2015
make: Entering directory '/usr/src/linux-headers-4.2.0-040200rc4-generic'
  CC [M]  /var/lib/dkms/psmouse/elantech-x551c/build/src/psmouse-base.o
  CC [M]  /var/lib/dkms/psmouse/elantech-x551c/build/src/synaptics.o
  CC [M]  /var/lib/dkms/psmouse/elantech-x551c/build/src/alps.o
  CC [M]  /var/lib/dkms/psmouse/elantech-x551c/build/src/elantech.o
  CC [M]  /var/lib/dkms/psmouse/elantech-x551c/build/src/logips2pp.o
  CC [M]  /var/lib/dkms/psmouse/elantech-x551c/build/src/lifebook.o
  CC [M]  /var/lib/dkms/psmouse/elantech-x551c/build/src/sentelic.o
  CC [M]  /var/lib/dkms/psmouse/elantech-x551c/build/src/trackpoint.o
  CC [M]  /var/lib/dkms/psmouse/elantech-x551c/build/src/touchkit_ps2.o
  CC [M]  /var/lib/dkms/psmouse/elantech-x551c/build/src/cypress_ps2.o
/var/lib/dkms/psmouse/elantech-x551c/build/src/cypress_ps2.c: In function ‘cypress_process_packet’:
/var/lib/dkms/psmouse/elantech-x551c/build/src/cypress_ps2.c:543:2: error: too few arguments to function ‘input_mt_assign_slots’
  input_mt_assign_slots(input, slots, pos, n);
  ^
In file included from /var/lib/dkms/psmouse/elantech-x551c/build/src/cypress_ps2.c:25:0:
include/linux/input/mt.h:121:5: note: declared here
 int input_mt_assign_slots(struct input_dev *dev, int *slots,
     ^
scripts/Makefile.build:258: recipe for target '/var/lib/dkms/psmouse/elantech-x551c/build/src/cypress_ps2.o' failed
make[1]: *** [/var/lib/dkms/psmouse/elantech-x551c/build/src/cypress_ps2.o] Error 1
Makefile:1550: recipe for target 'psmouse.ko' failed
make: *** [psmouse.ko] Error 2
make: Leaving directory '/usr/src/linux-headers-4.2.0-040200rc4-generic'