Merge branches 'x86/xen', 'x86/build', 'x86/microcode', 'x86/mm-debug-v2', 'x86/memor...

[mv-sheeva.git] / mm / highmem.c

diff --git a/mm/highmem.c b/mm/highmem.c
index e16e1523b688680572513b16ef0e49d5ac0314f0..b36b83b920ffe862f0d7060e29687c9bb998a0d8 100644 (file)
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -70,6 +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();
 
@@ -101,8 +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));
 }
 
 /**