From 9da47925f0b0bb6cbcce2625d187bbb9d630a78c Mon Sep 17 00:00:00 2001
From: kib <kib@FreeBSD.org>
Date: Mon, 25 Nov 2019 14:16:41 +0000
Subject: [PATCH] Limit bus_dma_dmar_set_buswide() definition to kernel only.

The header is abused for inclusion into userspace, and on stable
branches neither device_t nor bool types are not defined when used
from userspace.

Sponsored by:	The FreeBSD Foundation
X-MFC after:	now
---
 sys/x86/include/bus_dma.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/x86/include/bus_dma.h b/sys/x86/include/bus_dma.h
index 016c0fac85d8..320e3ef04e35 100644
--- a/sys/x86/include/bus_dma.h
+++ b/sys/x86/include/bus_dma.h
@@ -191,7 +191,9 @@ _bus_dmamap_complete(bus_dma_tag_t dmat, bus_dmamap_t map,
 	return (tc->impl->map_complete(dmat, map, segs, nsegs, error));
 }
 
+#ifdef _KERNEL
 bool bus_dma_dmar_set_buswide(device_t dev);
+#endif
 
 #endif /* !_X86_BUS_DMA_H_ */