[PATCH -mm -v7 5/9] mm, THP, swap: Support to clear SWAP_HAS_CACHE for huge page

From: Huang Ying __swapcache_free() is added to support to clear the SWAP_HAS_CACHE flag for the huge page. This will free the specified swap cluster now. Because now this function will be called only in the error path to free the swap cluster just allocated. So the

[PATCH -mm -v7 5/9] mm, THP, swap: Support to clear SWAP_HAS_CACHE for huge page

From: Huang Ying __swapcache_free() is added to support to clear the SWAP_HAS_CACHE flag for the huge page. This will free the specified swap cluster now. Because now this function will be called only in the error path to free the swap cluster just allocated. So the corresponding swap_map[i]