mm/swapfile.c: use list_{next,first}_entry

To make the intention clearer, use list_{next,first}_entry instead of
list_entry().

Signed-off-by: Geliang Tang <geliangtang@163.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 10 deletions

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 58877312cf6b..77551a553f57 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -165,8 +165,6 @@ static void discard_swap_cluster(struct swap_info_struct *si,
         int found_extent = 0;
 
         while (nr_pages) {
-                struct list_head *lh;
-
                 if (se->start_page <= start_page &&
                     start_page < se->start_page + se->nr_pages) {
                         pgoff_t offset = start_page - se->start_page;
@@ -188,8 +186,7 @@ static void discard_swap_cluster(struct swap_info_struct *si,
                                 break;
                 }
 
-                lh = se->list.next;
-                se = list_entry(lh, struct swap_extent, list);
+                se = list_next_entry(se, list);
         }
 }
 
@@ -903,7 +900,7 @@ int swp_swapcount(swp_entry_t entry)
         VM_BUG_ON(page_private(page) != SWP_CONTINUED);
 
         do {
-                page = list_entry(page->lru.next, struct page, lru);
+                page = list_next_entry(page, lru);
                 map = kmap_atomic(page);
                 tmp_count = map[offset];
                 kunmap_atomic(map);
@@ -1633,14 +1630,11 @@ static sector_t map_swap_entry(swp_entry_t entry, struct block_device **bdev)
         se = start_se;
 
         for ( ; ; ) {
-                struct list_head *lh;
-
                 if (se->start_page <= offset &&
                                 offset < (se->start_page + se->nr_pages)) {
                         return se->start_block + (offset - se->start_page);
                 }
-                lh = se->list.next;
-                se = list_entry(lh, struct swap_extent, list);
+                se = list_next_entry(se, list);
                 sis->curr_swap_extent = se;
                 BUG_ON(se == start_se);         /* It *must* be present */
         }
@@ -1664,7 +1658,7 @@ static void destroy_swap_extents(struct swap_info_struct *sis)
         while (!list_empty(&sis->first_swap_extent.list)) {
                 struct swap_extent *se;
 
-                se = list_entry(sis->first_swap_extent.list.next,
+                se = list_first_entry(&sis->first_swap_extent.list,
                                 struct swap_extent, list);
                 list_del(&se->list);
                 kfree(se);