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Diffstat (limited to 'arch/um/include/asm/pgtable.h')
-rw-r--r--arch/um/include/asm/pgtable.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index 02db81b7b86..58da2480a7f 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