Linux 5.6-rc1 kselftest build failures

[shuah]

The following tests fail to build on x86_64

openat2:

tools/testing/selftests/openat2'
gcc -Wall -O2 -g -fsanitize=address -fsanitize=undefined 
openat2_test.c helpers.c  -o tools/testing/selftests/openat2/openat2_test
In file included from /usr/include/fcntl.h:301,
                 from helpers.c:9:
In function âopenatâ,
    inlined from âtouchatâ at helpers.c:49:11:
/usr/include/x86_64-linux-gnu/bits/fcntl2.h:126:4: error: call to 
â__openat_missing_modeâ declared with attribute error: openat with 
O_CREAT or O_TMPFILE in third argument needs 4 arguments
  126 |    __openat_missing_mode ();
      |    ^~~~~~~~~~~~~~~~~~~~~~~~

timerns:

tools/testing/selftests/timens'
gcc -Wall -Werror -pthread  -lrt -ldl  timens.c  -o 
tools/testing/selftests/timens/timens
/usr/bin/ld: /tmp/ccGy5CST.o: in function `check_config_posix_timers':
timens.c:(.text+0x65a): undefined reference to `timer_create'
collect2: error: ld returned 1 exit status

thanks,
-- Shuah