mm, highmem: get virtual address of the page using PKMAP_ADDR()

In flush_all_zero_pkmaps(), we have an index of the pkmap associated with
the page.  Using this index, we can simply get virtual address of the
page.  So change it.

Signed-off-by: Joonsoo Kim <js1304@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/mm/highmem.c b/mm/highmem.c
index 4d6f96c20191..d999077431df 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -137,8 +137,7 @@ static void flush_all_zero_pkmaps(void)
                  * So no dangers, even with speculative execution.
                  */
                 page = pte_page(pkmap_page_table[i]);
-                pte_clear(&init_mm, (unsigned long)page_address(page),
-                          &pkmap_page_table[i]);
+                pte_clear(&init_mm, PKMAP_ADDR(i), &pkmap_page_table[i]);
 
                 set_page_address(page, NULL);
                 need_flush = 1;