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

IRQ_PORTF_INTB

configname: CONFIG_IRQ_PORTF_INTB

Linux Kernel Configuration
└─>BF527 Specific Configuration
└─>Priority
└─>IRQ_PORTF_INTB
In linux kernel since version 2.6.24 (release Date: 2008-01-24)