CONFIG_CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN is not available for thedefaultarchitecture x86.
Result is shown for architecture cris
default or selected kernelversion does not have config value CONFIG_CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN.
Result is shown for kernelversion 5.4.123

DMA 7

configname: CONFIG_CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN

Ser0 DMA in assignment
└─>DMA 7
In linux kernel since version 2.6.12