[PATCH] uml-i386: fix build breakage with CONFIG_HIGHMEM

missing helper used by arch/i386/mm/highmem.c, which is pulled
into build on that configuration.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/asm-um/pgtable.h b/include/asm-um/pgtable.h
index 188f726217766f8e45bc7dce5a130e509d9b2f68..e57ff136ee510e884ea4474a7e2f21bde36b2390 100644 (file)
--- a/include/asm-um/pgtable.h
+++ b/include/asm-um/pgtable.h
@@ -408,6 +408,15 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 
 #include <asm-generic/pgtable-nopud.h>
 
+#ifdef CONFIG_HIGHMEM
+/* 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
+
 #endif
 #endif