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CONFIG_ARM_ERRATA_852421: ARM errata: A17: DMB ST might fail to create order between stores

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The Linux kernel configuration item CONFIG_ARM_ERRATA_852421:

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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.



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