--- a/vboxdrv/r0drv/linux/mp-r0drv-linux.c.ORIG	2019-01-23 12:39:29.000000000 +0100
+++ b/vboxdrv/r0drv/linux/mp-r0drv-linux.c	2019-09-17 13:12:18.187037249 +0200
@@ -283,12 +283,16 @@
     if (RTCpuSetCount(&OnlineSet) > 1)
     {
         /* Fire the function on all other CPUs without waiting for completion. */
-# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 3, 0)
+       smp_call_function(rtmpLinuxAllWrapper, &Args, 0 /* wait */);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
         int rc = smp_call_function(rtmpLinuxAllWrapper, &Args, 0 /* wait */);
-# else
+#else
         int rc = smp_call_function(rtmpLinuxAllWrapper, &Args, 0 /* retry */, 0 /* wait */);
 # endif
+# if LINUX_VERSION_CODE < KERNEL_VERSION(5, 3, 0)
         Assert(!rc); NOREF(rc);
+#endif
     }
 #endif
 
@@ -326,7 +330,9 @@
 {
 #ifdef CONFIG_SMP
     IPRT_LINUX_SAVE_EFL_AC();
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 3, 0)
     int rc;
+#endif
     RTMPARGS Args;
 
     RTTHREADPREEMPTSTATE PreemptState = RTTHREADPREEMPTSTATE_INITIALIZER;
@@ -337,14 +343,18 @@
     Args.cHits = 0;
 
     RTThreadPreemptDisable(&PreemptState);
-# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 3, 0)
+    smp_call_function(rtmpLinuxWrapper, &Args, 1 /* wait */);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
     rc = smp_call_function(rtmpLinuxWrapper, &Args, 1 /* wait */);
-# else /* older kernels */
+#else /* older kernels */
     rc = smp_call_function(rtmpLinuxWrapper, &Args, 0 /* retry */, 1 /* wait */);
-# endif /* older kernels */
+#endif /* older kernels */
     RTThreadPreemptRestore(&PreemptState);
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 3, 0)
     Assert(rc == 0); NOREF(rc);
+#endif
     IPRT_LINUX_RESTORE_EFL_AC();
 #else
     RT_NOREF(pfnWorker, pvUser1, pvUser2);
--- a/vboxnetflt/linux/VBoxNetFlt-linux.c.ORIG	2019-03-15 17:22:12.000000000 +0100
+++ b/vboxnetflt/linux/VBoxNetFlt-linux.c	2019-09-17 13:19:51.112012291 +0200
@@ -2123,7 +2123,10 @@
 #endif
     if (in_dev != NULL)
     {
-        for_ifa(in_dev) {
+       /* macros for_ifa() and endfor_ifa() disappear for kernel 5.3
+        * Code them directly */
+        struct in_ifaddr *ifa;
+       for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
             if (VBOX_IPV4_IS_LOOPBACK(ifa->ifa_address))
                 return NOTIFY_OK;
 
@@ -2137,7 +2140,7 @@
 
             pThis->pSwitchPort->pfnNotifyHostAddress(pThis->pSwitchPort,
                 /* :fAdded */ true, kIntNetAddrType_IPv4, &ifa->ifa_address);
-        } endfor_ifa(in_dev);
+        }
     }
 
     /*