selftests: breakpoint compile failed

$ make ARCH=aarch64 CROSS_COMPILE=aarch64-linux-gnu-
aarch64-linux-gnu-gcc     breakpoint_test_arm64.c  -o /home/naresh.kamboju/kernel/linux-kselftest/tools/testing/selftests/breakpoints/breakpoint_test_arm64
breakpoint_test_arm64.c: In function 'set_watchpoint':
breakpoint_test_arm64.c:91:28: error: storage size of 'dreg_state' isn't known
  struct user_hwdebug_state dreg_state;
                            ^
In file included from /home/naresh.kamboju/gcc-linaro-5.3-2016.02-x86_64_aarch64-linux-gnu/aarch64-linux-gnu/libc/usr/include/alloca.h:24:0,
                 from /home/naresh.kamboju/gcc-linaro-5.3-2016.02-x86_64_aarch64-linux-gnu/aarch64-linux-gnu/libc/usr/include/stdlib.h:492,
                 from ../kselftest.h:13,
                 from breakpoint_test_arm64.c:37:
breakpoint_test_arm64.c:98:32: error: invalid use of undefined type 'struct user_hwdebug_state'
  iov.iov_len = offsetof(struct user_hwdebug_state, dbg_regs) +
                                ^
breakpoint_test_arm64.c: In function 'run_test':
breakpoint_test_arm64.c:171:25: error: 'TRAP_HWBKPT' undeclared (first use in this function)
  if (siginfo.si_code != TRAP_HWBKPT) {
                         ^
breakpoint_test_arm64.c:171:25: note: each undeclared identifier is reported only once for each function it appears in
make: *** [/home/naresh.kamboju/kernel/linux-kselftest/tools/testing/selftests/breakpoints/breakpoint_test_arm64] Error 1