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Diffstat (limited to 'mm/highmem.c')
-rw-r--r--mm/highmem.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/highmem.c b/mm/highmem.c
index 7da4a7b6af11..b36b83b920ff 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));
}
/**