kernelconfig_penguin
default or selected kernelversion does not have config value CONFIG_ATM_CLIP_NO_ICMP.
Result is shown for kernelversion 5.9.9

Do NOT send ICMP if no neighbour

configname: CONFIG_ATM_CLIP_NO_ICMP

Linux Kernel Configuration
└─> Networking support
└─> Networking options
└─> Do NOT send ICMP if no neighbour

Normally, an "ICMP host unreachable" message is sent if a neighbour
cannot be reached because there is no VC to it in the kernel's
ATMARP table. This may cause problems when ATMARP table entries are
briefly removed during revalidation. If you say Y here, packets to
such neighbours are silently discarded instead.