default or selected kernelversion does not have config value CONFIG_ATARI_SLM.
Result is shown for kernelversion 5.15.113

Atari SLM laser printer support

modulename: acsi_slm.ko

configname: CONFIG_ATARI_SLM

Linux Kernel Configuration
└─>Device Drivers
└─>Block devices
└─>Atari SLM laser printer support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
If you have an Atari SLM laser printer, say Y to include support for
it in the kernel. Otherwise, say N. This driver is also available as
a module ( = code which can be inserted in and removed from the
running kernel whenever you want). The module will be called
acsi_slm. Be warned: the driver needs much ST-RAM and can cause
problems due to that fact!

source code: