make -C /builds/linux/tools/testing/selftests/../../../tools/arch/arm64/tools/ OUTPUT=/builds/linux/tools/testing/selftests/../../../tools/
make[4]: Entering directory '/builds/linux/tools/testing/selftests/ublk'
In file included from kublk.c:6:
kublk.c: In function 'cmd_dev_get_features':
kublk.c:1364:30: error: 'UBLK_F_UNPRIVILEGED_DEV' undeclared (first use in this function)
 1364 |                 [const_ilog2(UBLK_F_UNPRIVILEGED_DEV)] = "UNPRIVILEGED_DEV",
      |                              ^~~~~~~~~~~~~~~~~~~~~~~
kublk.c:1357:46: note: in definition of macro 'const_ilog2'
 1357 | #define const_ilog2(x) (63 - __builtin_clzll(x))
      |                                              ^