CONFIG_ARM_ERRATA_754327 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
ARM errata: no automatic Store Buffer drain
configname: CONFIG_ARM_ERRATA_754327
Linux Kernel Configuration
└─>System Type
└─>ARM errata: no automatic Store Buffer drain
In linux kernel since version 2.6.39 (release Date: 2011-05-18)
This option enables the workaround for the 754327 Cortex-A9 (prior to
r2p0) erratum. The Store Buffer does not have any automatic draining
mechanism and therefore a livelock may occur if an external agent
continuously polls a memory location waiting to observe an update.
This workaround defines cpu_relax() as smp_mb(), preventing correctly
written polling loops from denying visibility of updates to memory.
r2p0) erratum. The Store Buffer does not have any automatic draining
mechanism and therefore a livelock may occur if an external agent
continuously polls a memory location waiting to observe an update.
This workaround defines cpu_relax() as smp_mb(), preventing correctly
written polling loops from denying visibility of updates to memory.