diff --git a/localversion.patch b/localversion.patch
index 115d0b3..cc0efea 100644
--- a/localversion.patch
+++ b/localversion.patch
@@ -14,4 +14,4 @@
 --- /dev/null
 +++ linux-stable/localversion-rt
 @@ -0,0 +1 @@
-+-rt27
++-rt28
diff --git a/x86-highmem-make-it-work.patch b/x86-highmem-make-it-work.patch
index b40bba2..5c8bc94 100644
--- a/x86-highmem-make-it-work.patch
+++ b/x86-highmem-make-it-work.patch
@@ -7,10 +7,10 @@
 Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 ---
  arch/x86/include/asm/highmem.h |   23 +++++++++++++++++++++++
- arch/x86/mm/highmem_32.c       |    2 ++
+ arch/x86/mm/highmem_32.c       |   12 ++++++++++++
  include/linux/highmem.h        |    2 ++
  mm/highmem.c                   |   21 +++++++++++++++++----
- 4 files changed, 44 insertions(+), 4 deletions(-)
+ 4 files changed, 54 insertions(+), 4 deletions(-)
 
 Index: linux-stable/arch/x86/include/asm/highmem.h
 ===================================================================
@@ -60,15 +60,25 @@
 ===================================================================
 --- linux-stable.orig/arch/x86/mm/highmem_32.c
 +++ linux-stable/arch/x86/mm/highmem_32.c
-@@ -21,6 +21,7 @@ void kunmap(struct page *page)
+@@ -21,6 +21,17 @@ void kunmap(struct page *page)
  }
  EXPORT_SYMBOL(kunmap);
  
++#ifdef CONFIF_PREEMPT_RT_FULL
++void *__kmap_prot(struct page *page, pgprot_t prot)
++{
++	might_sleep();
++	if (!PageHighMem(page))
++		return page_address(page);
++	return kmap_high_prot(page, prot);
++}
++#endif
++
 +#ifndef CONFIG_PREEMPT_RT_FULL
  /*
   * kmap_atomic/kunmap_atomic is significantly faster than kmap/kunmap because
   * no global lock is needed and because the kmap code must perform a global TLB
-@@ -115,6 +116,7 @@ struct page *kmap_atomic_to_page(void *p
+@@ -115,6 +126,7 @@ struct page *kmap_atomic_to_page(void *p
  	return pte_page(*pte);
  }
  EXPORT_SYMBOL(kmap_atomic_to_page);