CONFIG_ARM64_ERRATUM_819472 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64

Cortex-A53: 819472: Store exclusive instructions might cause data corruption

configname: CONFIG_ARM64_ERRATUM_819472

Linux Kernel Configuration
└─>Kernel Features
└─>ARM errata workarounds via the alternatives framework
└─>Cortex-A53: 819472: Store exclusive instructions might cause data corruption
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This option adds an alternative code sequence to work around ARM
erratum 819472 on Cortex-A53 parts up to r0p1 with an L2 cache
present when it is connected to a coherent interconnect.

If the processor is executing a load and store exclusive sequence at
the same time as a processor in another cluster is executing a cache
maintenance operation to the same address, then this erratum might
cause data corruption.

The workaround promotes data cache clean instructions to
data cache clean-and-invalidate.
Please note that this does not necessarily enable the workaround,
as it depends on the alternative framework, which will only patch
the kernel if an affected CPU is detected.

If unsure, say Y.