NOHZ_KICK_MASK
flags = atomic_fetch_andnot(NOHZ_KICK_MASK | NOHZ_NEWILB_KICK, nohz_flags(cpu));
WARN_ON(!(flags & NOHZ_KICK_MASK));
if (flags & NOHZ_KICK_MASK)
WARN_ON_ONCE((flags & NOHZ_KICK_MASK) == NOHZ_BALANCE_KICK);