virtualbox/fixes_for_5.9.patch

This patch file contains the changes needed to compile the VirtualBox
modules for kernel 5.9.0+.

The changes are as follows:
1. The kernel headers no longer define HAVE_UNLOCKED_IOCTL; however,
   this symbol is needed for compilation of VB.
2. The calling sequence for get_user_pages_remote() is changed.
3. Routine sched_setscheduler() is replaced by sched_set_fifo_low().
4. The type of vbox_master_set() is changed from int to void.
5. Routine drm_gem_object_put_unlocked() is replaced by drm_gem_object_put().
6. Member offset is removed from struct ttm_buffer_object.

Index: VirtualBox-6.1.14/src/VBox/Runtime/r0drv/linux/the-linux-kernel.h
===================================================================
--- VirtualBox-6.1.14.orig/src/VBox/Runtime/r0drv/linux/the-linux-kernel.h
+++ VirtualBox-6.1.14/src/VBox/Runtime/r0drv/linux/the-linux-kernel.h
@@ -137,7 +137,10 @@
 #include <linux/interrupt.h>
 #include <linux/completion.h>
 #include <linux/compiler.h>
-#ifndef HAVE_UNLOCKED_IOCTL /* linux/fs.h defines this */
+#if RTLNX_VER_MIN(5, 9, 0)
+#define HAVE_UNLOCKED_IOCTL 1	/* defined in linux/fs.h for kernels before 5.9 */
+#endif
+#ifndef HAVE_UNLOCKED_IOCTL
 # include <linux/smp_lock.h>
 #endif
 /* For the shared folders module */
Index: VirtualBox-6.1.14/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
===================================================================
--- VirtualBox-6.1.14.orig/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
+++ VirtualBox-6.1.14/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
@@ -1181,7 +1181,9 @@ DECLHIDDEN(int) rtR0MemObjNativeLockUser
          */
         else
             rc = get_user_pages_remote(
+#if    RTLNX_VER_MAX(5, 9, 0)
                                 pTask,                  /* Task for fault accounting. */
+#endif
                                 pTask->mm,              /* Whose pages. */
                                 R3Ptr,                  /* Where from. */
                                 cPages,                 /* How many pages. */
Index: VirtualBox-6.1.14/src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c
===================================================================
--- VirtualBox-6.1.14.orig/src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c
+++ VirtualBox-6.1.14/src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c
@@ -92,8 +92,12 @@ DECLHIDDEN(int) rtThreadNativeSetPriorit
             return VERR_INVALID_PARAMETER;
     }
 
+#if RTLNX_VER_MAX(5, 9, 0)
     sched_setscheduler(current, iSchedClass, &Param);
 #else
+    sched_set_fifo_low(current);
+#endif
+#else
     RT_NOREF_PV(enmType);
 #endif
     RT_NOREF_PV(pThread);
Index: VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_drv.c
===================================================================
--- VirtualBox-6.1.14.orig/src/VBox/Additions/linux/drm/vbox_drv.c
+++ VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_drv.c
@@ -262,8 +262,13 @@ static const struct file_operations vbox
 	.read = drm_read,
 };
 
+#if RTLNX_VER_MAX(5, 9, 0)
 static int vbox_master_set(struct drm_device *dev,
 			   struct drm_file *file_priv, bool from_open)
+#else
+static void vbox_master_set(struct drm_device *dev,
+			    struct drm_file *file_priv, bool from_open)
+#endif
 {
 	struct vbox_private *vbox = dev->dev_private;
 
Index: VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_fb.c
===================================================================
--- VirtualBox-6.1.14.orig/src/VBox/Additions/linux/drm/vbox_fb.c
+++ VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_fb.c
@@ -405,7 +405,11 @@ void vbox_fbdev_fini(struct drm_device *
 				vbox_bo_unpin(bo);
 			vbox_bo_unreserve(bo);
 		}
+#if RTLNX_VER_MIN(5, 9, 0)
+		drm_gem_object_put(afb->obj);
+#else
 		drm_gem_object_put_unlocked(afb->obj);
+#endif
 		afb->obj = NULL;
 	}
 	drm_fb_helper_fini(&fbdev->helper);
Index: VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_main.c
===================================================================
--- VirtualBox-6.1.14.orig/src/VBox/Additions/linux/drm/vbox_main.c
+++ VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_main.c
@@ -40,14 +40,19 @@
 #include <VBoxVideoVBE.h>
 
 #include "hgsmi_channels.h"
+#include <linux/version.h>
+
 
 static void vbox_user_framebuffer_destroy(struct drm_framebuffer *fb)
 {
 	struct vbox_framebuffer *vbox_fb = to_vbox_framebuffer(fb);
 
 	if (vbox_fb->obj)
+#if RTLNX_VER_MAX(5, 9, 0)
 		drm_gem_object_put_unlocked(vbox_fb->obj);
-
+#else
+		drm_gem_object_put(vbox_fb->obj);
+#endif
 	drm_framebuffer_cleanup(fb);
 	kfree(fb);
 }
@@ -221,7 +226,11 @@ static struct drm_framebuffer *vbox_user
 err_free_vbox_fb:
 	kfree(vbox_fb);
 err_unref_obj:
+#if RTLNX_VER_MAX(5, 9, 0)
 	drm_gem_object_put_unlocked(obj);
+#else
+	drm_gem_object_put(obj);
+#endif
 	return ERR_PTR(ret);
 }
 
@@ -588,7 +597,11 @@ int vbox_dumb_create(struct drm_file *fi
 		return ret;
 
 	ret = drm_gem_handle_create(file, gobj, &handle);
+#if RTLNX_VER_MAX(5, 9, 0)
 	drm_gem_object_put_unlocked(gobj);
+#else
+	drm_gem_object_put(gobj);
+#endif
 	if (ret)
 		return ret;
 
Index: VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_drv.h
===================================================================
--- VirtualBox-6.1.14.orig/src/VBox/Additions/linux/drm/vbox_drv.h
+++ VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_drv.h
@@ -417,6 +417,9 @@ struct vbox_bo {
 #else
 	struct ttm_place placements[3];
 #endif
+#if RTLNX_VER_MIN(5, 9, 0)
+	uint64_t offset;
+#endif
 	int pin_count;
 };
 
Index: VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_mode.c
===================================================================
--- VirtualBox-6.1.14.orig/src/VBox/Additions/linux/drm/vbox_mode.c
+++ VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_mode.c
@@ -885,8 +885,11 @@ out_unmap_bo:
 out_unreserve_bo:
 	vbox_bo_unreserve(bo);
 out_unref_obj:
+#if RTLNX_VER_MAX(5, 9, 0)
 	drm_gem_object_put_unlocked(obj);
-
+#else
+	drm_gem_object_put(obj);
+#endif
 	return ret;
 }
 
Index: VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_ttm.c
===================================================================
--- VirtualBox-6.1.14.orig/src/VBox/Additions/linux/drm/vbox_ttm.c
+++ VirtualBox-6.1.14/src/VBox/Additions/linux/drm/vbox_ttm.c
@@ -445,7 +445,11 @@ err_free_vboxbo:
 
 static inline u64 vbox_bo_gpu_offset(struct vbox_bo *bo)
 {
+#if RTLNX_VER_MAX(5, 9, 0)
 	return bo->bo.offset;
+#else
+	return bo->offset;
+#endif
 }
 
 int vbox_bo_pin(struct vbox_bo *bo, u32 pl_flag, u64 *gpu_addr)