X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=mm%2Fhighmem.c;h=b36b83b920ffe862f0d7060e29687c9bb998a0d8;hb=13723d00e374c2a6d6ccb5af6de965e89c3e1b01;hp=7da4a7b6af11f1d359af60568b312838f8fa2802;hpb=6f58d79598c184dc4f18ceddfaa5fa7483bce0a5;p=~andy%2Flinux

diff --git a/mm/highmem.c b/mm/highmem.c
index 7da4a7b6af1..b36b83b920f 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -40,6 +40,7 @@
 #ifdef CONFIG_HIGHMEM
 
 unsigned long totalhigh_pages __read_mostly;
+EXPORT_SYMBOL(totalhigh_pages);
 
 unsigned int nr_free_highpages (void)
 {
@@ -69,6 +70,7 @@ static DECLARE_WAIT_QUEUE_HEAD(pkmap_map_wait);
 static void flush_all_zero_pkmaps(void)
 {
 	int i;
+	int need_flush = 0;
 
 	flush_cache_kmaps();
 
@@ -100,8 +102,10 @@ static void flush_all_zero_pkmaps(void)
 			  &pkmap_page_table[i]);
 
 		set_page_address(page, NULL);
+		need_flush = 1;
 	}
-	flush_tlb_kernel_range(PKMAP_ADDR(0), PKMAP_ADDR(LAST_PKMAP));
+	if (need_flush)
+		flush_tlb_kernel_range(PKMAP_ADDR(0), PKMAP_ADDR(LAST_PKMAP));
 }
 
 /**