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-rw-r--r--share/man/man9/bus_dma.92
1 files changed, 2 insertions, 0 deletions
diff --git a/share/man/man9/bus_dma.9 b/share/man/man9/bus_dma.9
index f97daee..340e354 100644
--- a/share/man/man9/bus_dma.9
+++ b/share/man/man9/bus_dma.9
@@ -655,6 +655,8 @@ a CPU and a DMA engine, frequently.
Use of this flag does not remove the requirement of using
bus_dmamap_sync, but it may reduce the cost of performing
these operations.
+.It Dv BUS_DMA_ZERO
+Causes the allocated memory to be set to all zeros.
.El
.It Fa mapp
Pointer to storage for the returned DMA map.
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