qed: Remove a stray tab

[cascardo/linux.git] / mm / swapfile.c

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 83874ec..031713a 100644 (file)
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -922,18 +922,19 @@ out:
  * to it.  And as a side-effect, free up its swap: because the old content
  * on disk will never be read, and seeking back there to write new content
  * later would only waste time away from clustering.
+ *
+ * NOTE: total_mapcount should not be relied upon by the caller if
+ * reuse_swap_page() returns false, but it may be always overwritten
+ * (see the other implementation for CONFIG_SWAP=n).
  */
-int reuse_swap_page(struct page *page)
+bool reuse_swap_page(struct page *page, int *total_mapcount)
 {
        int count;
 
        VM_BUG_ON_PAGE(!PageLocked(page), page);
        if (unlikely(PageKsm(page)))
-               return 0;
-       /* The page is part of THP and cannot be reused */
-       if (PageTransCompound(page))
-               return 0;
-       count = page_mapcount(page);
+               return false;
+       count = page_trans_huge_mapcount(page, total_mapcount);
        if (count <= 1 && PageSwapCache(page)) {
                count += page_swapcount(page);
                if (count == 1 && !PageWriteback(page)) {