Radix cross Linux

Index: ui/gfx/linux/dmabuf_uapi.h
===================================================================
--- ui/gfx/linux/dmabuf_uapi.h	(nonexistent)
+++ ui/gfx/linux/dmabuf_uapi.h	(revision 371)
@@ -0,0 +1,48 @@
+// Copyright 2023 The Chromium Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_GFX_LINUX_DMABUF_UAPI_H_
+#define UI_GFX_LINUX_DMABUF_UAPI_H_
+
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
+#include <linux/dma-buf.h>
+#else
+#include <linux/types.h>
+
+struct dma_buf_sync {
+  __u64 flags;
+};
+
+constexpr __u64 DMA_BUF_SYNC_READ = 1 << 0;
+constexpr __u64 DMA_BUF_SYNC_WRITE = 2 << 0;
+constexpr __u64 DMA_BUF_SYNC_RW = DMA_BUF_SYNC_READ | DMA_BUF_SYNC_WRITE;
+
+constexpr __u64 DMA_BUF_SYNC_START = 0 << 2;
+constexpr __u64 DMA_BUF_SYNC_END = 1 << 2;
+
+constexpr char DMA_BUF_BASE = 'b';
+constexpr unsigned long DMA_BUF_IOCTL_SYNC =
+    _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync);
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 0, 0)
+struct dma_buf_export_sync_file {
+  __u32 flags;
+  __s32 fd;
+};
+
+struct dma_buf_import_sync_file {
+  __u32 flags;
+  __s32 fd;
+};
+
+constexpr unsigned long DMA_BUF_IOCTL_EXPORT_SYNC_FILE =
+    _IOWR(DMA_BUF_BASE, 2, struct dma_buf_export_sync_file);
+constexpr unsigned long DMA_BUF_IOCTL_IMPORT_SYNC_FILE =
+    _IOW(DMA_BUF_BASE, 3, struct dma_buf_import_sync_file);
+#endif
+
+#endif  // UI_GFX_LINUX_DMABUF_UAPI_H_