diff --git a/vbox_fix_for_kernel_4.12.patch b/vbox_fix_for_kernel_4.12.patch
deleted file mode 100644
index 5ed9f28..0000000
--- a/vbox_fix_for_kernel_4.12.patch
+++ /dev/null
@@ -1,108 +0,0 @@
-Index: VirtualBox-5.1.22/src/VBox/HostDrivers/Support/linux/SUPDrv-linux.c
-===================================================================
---- VirtualBox-5.1.22.orig/src/VBox/HostDrivers/Support/linux/SUPDrv-linux.c
-+++ VirtualBox-5.1.22/src/VBox/HostDrivers/Support/linux/SUPDrv-linux.c
-@@ -1397,7 +1397,7 @@ RTDECL(int) SUPR0Printf(const char *pszF
- SUPR0DECL(uint32_t) SUPR0GetKernelFeatures(void)
- {
-     uint32_t fFlags = 0;
--#ifdef CONFIG_PAX_KERNEXEC
-+#if defined(CONFIG_PAX_KERNEXEC) || LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
-     fFlags |= SUPKERNELFEATURES_GDT_READ_ONLY;
- #endif
- #if defined(VBOX_STRICT) || defined(VBOX_WITH_EFLAGS_AC_SET_IN_VBOXDRV)
-Index: VirtualBox-5.1.22/src/VBox/Runtime/r0drv/linux/alloc-r0drv-linux.c
-===================================================================
---- VirtualBox-5.1.22.orig/src/VBox/Runtime/r0drv/linux/alloc-r0drv-linux.c
-+++ VirtualBox-5.1.22/src/VBox/Runtime/r0drv/linux/alloc-r0drv-linux.c
-@@ -36,6 +36,9 @@
- #include <iprt/err.h>
- #include "r0drv/alloc-r0drv.h"
- #include <linux/kmemleak.h>
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
-+#include <asm/set_memory.h>
-+#endif
- 
- #if (defined(RT_ARCH_AMD64) || defined(DOXYGEN_RUNNING)) && !defined(RTMEMALLOC_EXEC_HEAP)
- # if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23)
-Index: VirtualBox-5.1.22/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
-===================================================================
---- VirtualBox-5.1.22.orig/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
-+++ VirtualBox-5.1.22/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
-@@ -899,6 +899,9 @@ static struct page *rtR0MemObjLinuxVirtT
-     unsigned long   pfn;
-     struct page    *pPage;
-     pte_t          *pEntry;
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
-+    p4d_t	    p4d;
-+#endif
-     union
-     {
-         pgd_t       Global;
-@@ -917,9 +920,18 @@ static struct page *rtR0MemObjLinuxVirtT
-     u.Global = *pgd_offset(current->active_mm, ulAddr);
-     if (RT_UNLIKELY(pgd_none(u.Global)))
-         return NULL;
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
-+    p4d = *p4d_offset(&u.Global, ulAddr);
-+    if (RT_UNLIKELY(p4d_none(p4d) || p4d_large(p4d) || !p4d_present(p4d)))
-+        return NULL;
-+#endif
- 
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 11)
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
-+    u.Upper = *pud_offset(&p4d, ulAddr);
-+#else
-     u.Upper = *pud_offset(&u.Global, ulAddr);
-+#endif
-     if (RT_UNLIKELY(pud_none(u.Upper)))
-         return NULL;
- # if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
-@@ -1463,13 +1475,23 @@ static int rtR0MemObjLinuxFixPte(struct
- {
-     int rc = -ENOMEM;
-     pgd_t *pgd;
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
-+    p4d_t *p4d;
-+#endif
- 
-     spin_lock(&mm->page_table_lock);
- 
-     pgd = pgd_offset(mm, ulAddr);
-     if (!pgd_none(*pgd) && !pgd_bad(*pgd))
-     {
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
-+	p4d = p4d_offset(*pgd, ulAddr);
-+	if (p4d_none(*p4d))
-+	    goto exit;
-+	pmd_t *pmd = pmd_offset(p4d, ulAddr);
-+#else
-         pmd_t *pmd = pmd_offset(pgd, ulAddr);
-+#endif
-         if (!pmd_none(*pmd))
-         {
-             pte_t *ptep = pte_offset_map(pmd, ulAddr);
-@@ -1487,6 +1509,9 @@ static int rtR0MemObjLinuxFixPte(struct
-         }
-     }
- 
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
-+exit:
-+#endif
-     spin_unlock(&mm->page_table_lock);
-     return rc;
- }
-Index: VirtualBox-5.1.22/src/VBox/Runtime/r0drv/linux/the-linux-kernel.h
-===================================================================
---- VirtualBox-5.1.22.orig/src/VBox/Runtime/r0drv/linux/the-linux-kernel.h
-+++ VirtualBox-5.1.22/src/VBox/Runtime/r0drv/linux/the-linux-kernel.h
-@@ -320,6 +320,9 @@ DECLINLINE(unsigned long) msecs_to_jiffi
- #endif
- 
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
-+#include <asm/cacheflush.h>
-+#endif
- # define MY_SET_PAGES_EXEC(pPages, cPages)    set_pages_x(pPages, cPages)
- # define MY_SET_PAGES_NOEXEC(pPages, cPages)  set_pages_nx(pPages, cPages)
- #else
diff --git a/vbox_fix_for_kernel_4.13.patch b/vbox_fix_for_kernel_4.13.patch
deleted file mode 100644
index bb84087..0000000
--- a/vbox_fix_for_kernel_4.13.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-Index: VirtualBox-5.1.22/src/VBox/Runtime/r0drv/linux/waitqueue-r0drv-linux.h
-===================================================================
---- VirtualBox-5.1.22.orig/src/VBox/Runtime/r0drv/linux/waitqueue-r0drv-linux.h
-+++ VirtualBox-5.1.22/src/VBox/Runtime/r0drv/linux/waitqueue-r0drv-linux.h
-@@ -39,6 +39,9 @@
-  *  schedule_hrtimeout_range. */
- #define RTR0SEMLNXWAIT_RESOLUTION   50000
- 
-+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 13, 0)
-+#define wait_queue_t wait_queue_entry_t
-+#endif
- 
- /**
-  * Kernel mode Linux wait state structure.