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The Linux kernel configuration item CONFIG_ARM_ERRATA_743622
:
( CONFIG_CPU_V7 ) && (! CONFIG_ARCH_MULTIPLATFORM )
This option enables the workaround for the 743622 Cortex-A9 (r2p*) erratum. Under very rare conditions, a faulty optimisation in the Cortex-A9 Store Buffer may lead to data corruption. This workaround sets a specific bit in the diagnostic register of the Cortex-A9 which disables the Store Buffer optimisation, preventing the defect from occurring. This has no visible impact on the overall performance or power consumption of the processor.
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