default or selected kernelversion does not have config value CONFIG_CRC32_SARWATE.
Result is shown for kernelversion 6.9.9

Sarwate's Algorithm (one byte at a time)

configname: CONFIG_CRC32_SARWATE

CRC32 implementation
└─>Sarwate's Algorithm (one byte at a time)
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Calculate checksum a byte at a time using Sarwate's algorithm. This
is not particularly fast, but has a small 256 byte lookup table.

Only choose this option if you know what you are doing.