CONFIG_IRQ_MEM_DMA1 is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
default or selected kernelversion does not have config value CONFIG_IRQ_MEM_DMA1.
Result is shown for kernelversion 6.7-rc3

IRQ_MEM_DMA1

configname: CONFIG_IRQ_MEM_DMA1

Linux Kernel Configuration
└─>BF537 Specific Configuration
└─>Priority
└─>IRQ_MEM_DMA1
In linux kernel since version 2.6.22 (release Date: 2007-07-08)