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powerpc: Enable the BUS_DMA_NOCACHE flag handling

Description

powerpc: Enable the BUS_DMA_NOCACHE flag handling

The flag handling was committed commented out 7 years ago. It works, and is
needed for LinuxKPI-based DRM drivers.

Also mark a local as potentially unusable, as it's only really used when KTR
is enabled.

Submitted by: mmacy

Details

Committed
jhibbitsAug 4 2019, 7:25 PM
Parents
rS350568: Resolve ipfilter kld unload issues related to VNET jails.
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