--- dma-buf-compat.h.orig	2024-08-27 18:15:44 UTC
+++ dma-buf-compat.h
@@ -0,0 +1,22 @@
+#ifdef __linux__
+#include <linux/dma-buf.h>
+#else
+typedef uint64_t __u64;
+
+// From https://github.com/evadot/drm-subtree or https://reviews.freebsd.org/D23085
+struct dma_buf_sync
+{
+  __u64 flags;
+};
+
+#define DMA_BUF_SYNC_READ  (1 << 0)
+#define DMA_BUF_SYNC_WRITE (2 << 0)
+#define DMA_BUF_SYNC_RW    (DMA_BUF_SYNC_READ | DMA_BUF_SYNC_WRITE)
+#define DMA_BUF_SYNC_START (0 << 2)
+#define DMA_BUF_SYNC_END   (1 << 2)
+#define DMA_BUF_SYNC_VALID_FLAGS_MASK \
+    (DMA_BUF_SYNC_RW | DMA_BUF_SYNC_END)
+
+#define DMA_BUF_BASE       'b'
+#define DMA_BUF_IOCTL_SYNC _IOW(DMA_BUF_BASE, 0, struct dma_buf_sync)
+#endif
--- gdk/gdkdmabuf.c.orig	2024-08-27 18:17:03 UTC
+++ gdk/gdkdmabuf.c
@@ -28,8 +28,8 @@
 #ifdef HAVE_DMABUF
 #include <sys/mman.h>
 #include <sys/ioctl.h>
-#include <linux/dma-buf.h>
 #include <epoxy/egl.h>
+#include "../dma-buf-compat.h"
 
 typedef struct _GdkDrmFormatInfo GdkDrmFormatInfo;
 
--- gsk/gpu/gskgpudownloadop.c.orig	2024-08-27 18:18:39 UTC
+++ gsk/gpu/gskgpudownloadop.c
@@ -16,7 +16,7 @@
 #include "gdk/gdkglcontextprivate.h"
 
 #ifdef HAVE_DMABUF
-#include <linux/dma-buf.h>
+#include "../../dma-buf-compat.h"
 #endif
 
 typedef struct _GskGpuDownloadOp GskGpuDownloadOp;
--- gsk/gpu/gskvulkanimage.c.orig	2024-08-27 18:18:26 UTC
+++ gsk/gpu/gskvulkanimage.c
@@ -15,7 +15,7 @@
 #include <fcntl.h>
 #include <string.h>
 #ifdef HAVE_DMABUF
-#include <linux/dma-buf.h>
+#include <../../dma-buf-compat.h>
 #endif
 
 struct _GskVulkanImage
--- meson.build.orig	2024-08-27 18:19:59 UTC
+++ meson.build
@@ -636,7 +636,7 @@ cdata.set('HAVE_DRM_FOURCC_H', libdrm_dep.found())
 libdrm_dep = libdrm_dep.partial_dependency(includes: true, compile_args: true)
 cdata.set('HAVE_DRM_FOURCC_H', libdrm_dep.found())
 
-cdata.set('HAVE_DMABUF', cc.has_header('linux/dma-buf.h'))
+cdata.set('HAVE_DMABUF', true)
 
 cloudproviders_dep = dependency('cloudproviders',
   required: get_option('cloudproviders'),