Build errors on Linux 4.7

[avikivity]

gcc 6.2.1.

  CC [M]  /home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_asm.o
/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_asm.c: In function 'dtrace_copystr':
/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_asm.c:197:2: warning: ignoring return value of 'copy_from_user', declared with attribute warn_unused_result [-Wunused-result]
  (void) copy_from_user((void *) kaddr, (void *) uaddr, size);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_asm.c: In function 'dtrace_getfp':
/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_asm.c:60:18: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address]
  return (greg_t) __builtin_frame_address(1);
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_asm.o: warning: objtool: asm_placeholder()+0x9: return without frame pointer restore
/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_asm.o: warning: objtool: asm_placeholder()+0x9: frame pointer state mismatch
  CC [M]  /home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_isa.o
distcc[9180] ERROR: compile /home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_isa.c on localhost failed
/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_isa.c:161:16: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
  .walk_stack = walk_stack,
                ^~~~~~~~~~
/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_isa.c:161:16: note: (near initialization for 'print_trace_ops.walk_stack')
/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_isa.c:167:13: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
  .address = print_trace_address,
             ^~~~~~~~~~~~~~~~~~~
/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_isa.c:167:13: note: (near initialization for 'print_trace_ops.address')
cc1: some warnings being treated as errors
scripts/Makefile.build:289: recipe for target '/home/avi/dtrace/build-4.7.3-100.fc23.x86_64/driver/dtrace_isa.o' failed

[fxlv]

Same problem.
Ubuntu 16.10, gcc version 6.2.0

[adolgert]

Kernel 4.8.0-37, gcc 6.2.0, Ubuntu 16.10.
stacktrace.h has changed, so print_trace_address in dtrace_isa.c returns an int.
Also indtrace_isa.c, the first argument to walk_stack is a task_struct*, so you can use task_thread_info(task) to get the thread_info from it.
Some of the definitions in vminfo.c have changed, too, and the updated ones are in vm_event_item.h.
HTH.