mm/compaction: do not count migratepages when unnecessary

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / mincore.c

diff --git a/mm/mincore.c b/mm/mincore.c
index 1016233..725c809 100644 (file)
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -70,13 +70,21 @@ static unsigned char mincore_page(struct address_space *mapping, pgoff_t pgoff)
         * any other file mapping (ie. marked !present and faulted in with
         * tmpfs's .fault). So swapped out tmpfs mappings are tested here.
         */
-       page = find_get_page(mapping, pgoff);
 #ifdef CONFIG_SWAP
-       /* shmem/tmpfs may return swap: account for swapcache page too. */
-       if (radix_tree_exceptional_entry(page)) {
-               swp_entry_t swap = radix_to_swp_entry(page);
-               page = find_get_page(swap_address_space(swap), swap.val);
-       }
+       if (shmem_mapping(mapping)) {
+               page = find_get_entry(mapping, pgoff);
+               /*
+                * shmem/tmpfs may return swap: account for swapcache
+                * page too.
+                */
+               if (radix_tree_exceptional_entry(page)) {
+                       swp_entry_t swp = radix_to_swp_entry(page);
+                       page = find_get_page(swap_address_space(swp), swp.val);
+               }
+       } else
+               page = find_get_page(mapping, pgoff);
+#else
+       page = find_get_page(mapping, pgoff);
 #endif
        if (page) {
                present = PageUptodate(page);