This patch file makes the necessary changes to the VirtualBox 5.1.30 sources
to allow the kernel modules to build with kernel 4.15.

The API changes are of several types:

1. The timer initialization routine init_timer_pinned() no longer exists, and
   is replaced by timer_setup().
2. The timer callback routine calling sequence is changed as is the technique
   for getting the timer information from the callback parameters.
3. The calling sequence for drm_encoder_find() is changed.
4. The calling sequence for the .get and .set members of the module_param_call()
   calls have changed.

This patch is released under the MIT license when appropriate, GPLv2 otherwise.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>

Index: VirtualBox-5.1.30/src/VBox/Runtime/r0drv/linux/timer-r0drv-linux.c
===================================================================
--- VirtualBox-5.1.30.orig/src/VBox/Runtime/r0drv/linux/timer-r0drv-linux.c
+++ VirtualBox-5.1.30/src/VBox/Runtime/r0drv/linux/timer-r0drv-linux.c
@@ -715,6 +715,14 @@ static enum hrtimer_restart rtTimerLinux
 #endif /* RTTIMER_LINUX_WITH_HRTIMER */
 
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+/**
+ * Timer callback for kernels 4.15 and later
+ */
+static void rtTimerLinuxStdCallback(struct timer_list *t)
+{
+    PRTTIMERLNXSUBTIMER pSubTimer = from_timer(pSubTimer, t, u.Std.LnxTimer);
+#else
 /**
  * Timer callback function for standard timers.
  *
@@ -723,6 +731,7 @@ static enum hrtimer_restart rtTimerLinux
 static void rtTimerLinuxStdCallback(unsigned long ulUser)
 {
     PRTTIMERLNXSUBTIMER pSubTimer = (PRTTIMERLNXSUBTIMER)ulUser;
+#endif
     PRTTIMER            pTimer    = pSubTimer->pParent;
 
     RTTIMERLNX_LOG(("stdcallback %p\n", pTimer));
@@ -1584,13 +1593,17 @@ RTDECL(int) RTTimerCreateEx(PRTTIMER *pp
         else
 #endif
         {
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+            timer_setup(&pTimer->aSubTimers[iCpu].u.Std.LnxTimer,rtTimerLinuxStdCallback, TIMER_PINNED);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
             init_timer_pinned(&pTimer->aSubTimers[iCpu].u.Std.LnxTimer);
 #else
             init_timer(&pTimer->aSubTimers[iCpu].u.Std.LnxTimer);
 #endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
             pTimer->aSubTimers[iCpu].u.Std.LnxTimer.data        = (unsigned long)&pTimer->aSubTimers[iCpu];
             pTimer->aSubTimers[iCpu].u.Std.LnxTimer.function    = rtTimerLinuxStdCallback;
+#endif
             pTimer->aSubTimers[iCpu].u.Std.LnxTimer.expires     = jiffies;
             pTimer->aSubTimers[iCpu].u.Std.u64NextTS            = 0;
         }
Index: VirtualBox-5.1.30/src/VBox/Additions/common/VBoxGuest/VBoxGuest-linux.c
===================================================================
--- VirtualBox-5.1.30.orig/src/VBox/Additions/common/VBoxGuest/VBoxGuest-linux.c
+++ VirtualBox-5.1.30/src/VBox/Additions/common/VBoxGuest/VBoxGuest-linux.c
@@ -958,7 +958,11 @@ EXPORT_SYMBOL(VBoxGuestIDCCall);
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
 
 /** log and dbg_log parameter setter. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+static int vgdrvLinuxParamLogGrpSet(const char *pszValue, const struct kernel_param *pParam)
+#else
 static int vgdrvLinuxParamLogGrpSet(const char *pszValue, struct kernel_param *pParam)
+#endif
 {
     if (g_fLoggerCreated)
     {
@@ -973,7 +973,11 @@ static int vgdrvLinuxParamLogGrpSet(cons
 }
 
 /** log and dbg_log parameter getter. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+static int vgdrvLinuxParamLogGrpGet(char *pszBuf, const struct kernel_param *pParam)
+#else
 static int vgdrvLinuxParamLogGrpGet(char *pszBuf, struct kernel_param *pParam)
+#endif
 {
     PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
     *pszBuf = '\0';
@@ -984,7 +984,11 @@ static int vgdrvLinuxParamLogGrpGet(char
 
 
 /** log and dbg_log_flags parameter setter. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+static int vgdrvLinuxParamLogFlagsSet(const char *pszValue, const struct kernel_param *pParam)
+#else
 static int vgdrvLinuxParamLogFlagsSet(const char *pszValue, struct kernel_param *pParam)
+#endif
 {
     if (g_fLoggerCreated)
     {
@@ -998,7 +998,11 @@ static int vgdrvLinuxParamLogFlagsSet(co
 }
 
 /** log and dbg_log_flags parameter getter. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+static int vgdrvLinuxParamLogFlagsGet(char *pszBuf, const struct kernel_param *pParam)
+#else
 static int vgdrvLinuxParamLogFlagsGet(char *pszBuf, struct kernel_param *pParam)
+#endif
 {
     PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
     *pszBuf = '\0';
@@ -1009,7 +1009,11 @@ static int vgdrvLinuxParamLogFlagsGet(ch
 
 
 /** log and dbg_log_dest parameter setter. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+static int vgdrvLinuxParamLogDstSet(const char *pszValue, const struct kernel_param *pParam)
+#else
 static int vgdrvLinuxParamLogDstSet(const char *pszValue, struct kernel_param *pParam)
+#endif
 {
     if (g_fLoggerCreated)
     {
@@ -1023,7 +1023,11 @@ static int vgdrvLinuxParamLogDstSet(cons
 }
 
 /** log and dbg_log_dest parameter getter. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+static int vgdrvLinuxParamLogDstGet(char *pszBuf, const struct kernel_param *pParam)
+#else
 static int vgdrvLinuxParamLogDstGet(char *pszBuf, struct kernel_param *pParam)
+#endif
 {
     PRTLOGGER pLogger = pParam->name[0] == 'd' ? RTLogDefaultInstance() : RTLogRelGetDefaultInstance();
     *pszBuf = '\0';
@@ -1034,7 +1034,11 @@ static int vgdrvLinuxParamLogDstGet(char
 
 
 /** r3_log_to_host parameter setter. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+static int vgdrvLinuxParamR3LogToHostSet(const char *pszValue, const struct kernel_param *pParam)
+#else
 static int vgdrvLinuxParamR3LogToHostSet(const char *pszValue, struct kernel_param *pParam)
+#endif
 {
     if (    pszValue == NULL
         || *pszValue == '\0'
@@ -1052,7 +1052,11 @@ static int vgdrvLinuxParamR3LogToHostSet
 }
 
 /** r3_log_to_host parameter getter. */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+static int vgdrvLinuxParamR3LogToHostGet(char *pszBuf, const struct kernel_param *pParam)
+#else
 static int vgdrvLinuxParamR3LogToHostGet(char *pszBuf, struct kernel_param *pParam)
+#endif
 {
     strcpy(pszBuf, g_DevExt.fLoggingEnabled ? "enabled" : "disabled");
     return strlen(pszBuf);
Index: VirtualBox-5.1.30/src/VBox/Additions/linux/drm/vbox_mode.c
===================================================================
--- VirtualBox-5.1.30.orig/src/VBox/Additions/linux/drm/vbox_mode.c
+++ VirtualBox-5.1.30/src/VBox/Additions/linux/drm/vbox_mode.c
@@ -369,7 +369,12 @@ static struct drm_encoder *vbox_best_sin
     LogFunc(("vboxvideo: %d: connector=%p\n", __LINE__, connector));
     /* pick the encoder ids */
     if (enc_id)
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 15, 0)
+        return drm_encoder_find(connector->dev, NULL, enc_id);
+#else
         return drm_encoder_find(connector->dev, enc_id);
+#endif
+
     LogFunc(("vboxvideo: %d\n", __LINE__));
     return NULL;
 }