[PATCH 31/34] selftests: iommu: Use installed kernel headers search path

[Mathieu Desnoyers]

Use $(KHDR_INCLUDES) as lookup path for installed kernel headers rather
than using kernel headers in include/uapi from the source kernel tree
kernel headers.

Remove bogus ../../../../include/ from the search path, because
kernel source headers are not needed by those user-space selftests, and
it causes issues because -I paths are searched before -isystem paths,
and conflicts for files appearing both in kernel sources and in uapi
headers with incompatible semantics (e.g. types.h).

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: linux-kselftest@xxxxxxxxxxxxxxx
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
---
 tools/testing/selftests/iommu/Makefile | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/testing/selftests/iommu/Makefile b/tools/testing/selftests/iommu/Makefile
index 7cb74d26f141..32c5fdfd0eef 100644
--- a/tools/testing/selftests/iommu/Makefile
+++ b/tools/testing/selftests/iommu/Makefile
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 CFLAGS += -Wall -O2 -Wno-unused-function
-CFLAGS += -I../../../../include/uapi/
-CFLAGS += -I../../../../include/
+CFLAGS += $(KHDR_INCLUDES)
 
 CFLAGS += -D_GNU_SOURCE
 
-- 
2.25.1