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| /freebsd-11-stable/sys/arm/arm/ | ||
| H A D | busdma_machdep-v6.c | diff 274602 Sun Nov 16 19:02:22 MST 2014 ian Do not do a cache invalidate on a PREREAD sync that is also a PREWRITE sync. The PREWRITE handling does a writeback of any dirty cachelines, so there's no danger of an eviction during the DMA corrupting the buffer. There will be an invalidate done during POSTREAD, so doing it before the read too is wasted time. |
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