iris: Include linux/sync_file.h instead of cut and pasting contents

Lets us drop some cut and pasted kernel header contents.

Linux 4.7 came out 4 years before we the first officially supported
release of this driver; iris won't run on kernels older than 4.16,
and 4.18.11+ is strongly recommended.  So I suspect it's safe to
assume that a kernel header from 4.7 will exist at build time.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3802>

diff --git a/src/gallium/drivers/iris/iris_fence.c b/src/gallium/drivers/iris/iris_fence.c
index 0d3144d61cce8a8d87f79d178a87f26d61632253..65982c41c7c773c3e8e02c1d0bac718feec1847b 100644 (file)
--- a/src/gallium/drivers/iris/iris_fence.c
+++ b/src/gallium/drivers/iris/iris_fence.c
@@ -26,6 +26,8 @@
  * Fences for driver and IPC serialisation, scheduling and synchronisation.
  */
 
+#include <linux/sync_file.h>
+
 #include "util/u_inlines.h"
 #include "intel/common/gen_gem.h"
 
@@ -269,24 +271,6 @@ iris_fence_finish(struct pipe_screen *p_screen,
    return gen_ioctl(screen->fd, DRM_IOCTL_SYNCOBJ_WAIT, &args) == 0;
 }
 
-#ifndef SYNC_IOC_MAGIC
-/* duplicated from linux/sync_file.h to avoid build-time dependency
- * on new (v4.7) kernel headers.  Once distro's are mostly using
- * something newer than v4.7 drop this and #include <linux/sync_file.h>
- * instead.
- */
-struct sync_merge_data {
-   char  name[32];
-   __s32 fd2;
-   __s32 fence;
-   __u32 flags;
-   __u32 pad;
-};
-
-#define SYNC_IOC_MAGIC '>'
-#define SYNC_IOC_MERGE _IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data)
-#endif
-
 static int
 sync_merge_fd(int sync_fd, int new_fd)
 {