Use an iorw fence since we're syncing cpu access and device access to
authorkettenis <kettenis@openbsd.org>
Thu, 29 Dec 2022 11:30:58 +0000 (11:30 +0000)
committerkettenis <kettenis@openbsd.org>
Thu, 29 Dec 2022 11:30:58 +0000 (11:30 +0000)
commite4bf8fd0cb0e4d9899e1ead86737575b3c5deba9
treecfdccd827b1ed09a1be297c3a9ffbf7e435ce802
parente982275c90939242a47626658c419c91fdffea50
Use an iorw fence since we're syncing cpu access and device access to
memory.

ok miod@
sys/arch/riscv64/riscv64/bus_dma.c