Will Deacon 5dab26af1b ARM: 6784/1: errata: no automatic Store Buffer drain on Cortex-A9 ... On revisions of the Cortex-A9 prior to r2p0, 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. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>		2011-03-09 21:40:18 +00:00
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asm	ARM: 6784/1: errata: no automatic Store Buffer drain on Cortex-A9	2011-03-09 21:40:18 +00:00