1 files changed, 8 insertions, 0 deletions

diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index 02db81b7b86e..58da2480a7f4 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -47,6 +47,7 @@ extern unsigned long end_iomem;
 
 #define VMALLOC_OFFSET  (__va_space)
 #define VMALLOC_START ((end_iomem + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
+#define PKMAP_BASE ((FIXADDR_START - LAST_PKMAP * PAGE_SIZE) & PMD_MASK)
 #ifdef CONFIG_HIGHMEM
 # define VMALLOC_END    (PKMAP_BASE-2*PAGE_SIZE)
 #else
@@ -355,4 +356,11 @@ extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
 
 #include <asm-generic/pgtable.h>
 
+/* Clear a kernel PTE and flush it from the TLB */
+#define kpte_clear_flush(ptep, vaddr)           \
+do {                                            \
+        pte_clear(&init_mm, (vaddr), (ptep));   \
+        __flush_tlb_one((vaddr));               \
+} while (0)
+
 #endif