[PATCH] dma-mapping: benchmark: Fix compile error in user-space tool

[Gerd Bayer <gbayer@linux.ibm.com>]

Since [1] the user-space program dma_map_benchmark shares the header file
linux/map_benchmark.h with the kernel driver in kernel/dma/map_benchmark.c.
With latest kernel version this does not compile any more.

While https://kernelnewbies.org/KernelHeaders suggests otherwise, allow it
to use of kernel headers through the uapi/ include direcotry. I assume we can
do so safely, since the controlling user-space program is distributed with
the kernel.

With this change dma_map_benchmark compiles with just the obvious warning
about uapi usage on ARCH=x86 and s390 and runs on ARCH=s390.

[1] commit 8ddde07a3d28 ("dma-mapping: benchmark: extract a common header file for map_benchmark definition")

Signed-off-by: Gerd Bayer <gbayer@linux.ibm.com>
---
 tools/testing/selftests/dma/dma_map_benchmark.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/dma/dma_map_benchmark.c b/tools/testing/selftests/dma/dma_map_benchmark.c
index 5c997f17fcbd..d49d7ea6a63e 100644
--- a/tools/testing/selftests/dma/dma_map_benchmark.c
+++ b/tools/testing/selftests/dma/dma_map_benchmark.c
@@ -10,7 +10,7 @@
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
-#include <linux/types.h>
+#include <uapi/linux/types.h>
 #include <linux/map_benchmark.h>
 
 #define NSEC_PER_MSEC	1000000L

base-commit: 8abacb3356e68261ccd3a2ad74ed6042363e5d0f
-- 
2.38.1