kernelconfig_penguin
CONFIG_ARM_ERRATA_852421 is not available for the default architecture x86.
Result is shown for architecture arm
depends
CONFIG_CPU_V7

ARM errata: A17: DMB ST might fail to create order between stores

configname: CONFIG_ARM_ERRATA_852421

Linux Kernel Configuration
└─> System Type
└─> ARM errata: A17: DMB ST might fail to create order between stores

This option enables the workaround for the 852421 Cortex-A17
(r1p0, r1p1, r1p2) erratum. Under very rare timing conditions,
execution of a DMB ST instruction might fail to properly order
stores from GroupA and stores from GroupB.