CONFIG_PFB is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
default or selected kernelversion does not have config value CONFIG_PFB.
Result is shown for kernelversion 6.7-rc3
PF Interrupt B
configname: CONFIG_PFB
Linux Kernel Configuration
└─>BF533/2/1 Specific Configuration
└─>Priority
└─>PF Interrupt B