zsmalloc: drop unused member 'mapping_area->huge'

When unmapping a huge class page in zs_unmap_object, the page will be
unmapped by kmap_atomic.  the "!area->huge" branch in __zs_unmap_object
is alway true, and no code set "area->huge" now, so we can drop it.

Signed-off-by: YiPing Xu <xuyiping@huawei.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2d7c4c1..43e4cbc 100644 (file)
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -281,7 +281,6 @@ struct mapping_area {
 #endif
        char *vm_addr; /* address of kmap_atomic()'ed pages */
        enum zs_mapmode vm_mm; /* mapping mode */
-       bool huge;
 };
 
 static int create_handle_cache(struct zs_pool *pool)
@@ -1127,11 +1126,9 @@ static void __zs_unmap_object(struct mapping_area *area,
                goto out;
 
        buf = area->vm_buf;
-       if (!area->huge) {
-               buf = buf + ZS_HANDLE_SIZE;
-               size -= ZS_HANDLE_SIZE;
-               off += ZS_HANDLE_SIZE;
-       }
+       buf = buf + ZS_HANDLE_SIZE;
+       size -= ZS_HANDLE_SIZE;
+       off += ZS_HANDLE_SIZE;
 
        sizes[0] = PAGE_SIZE - off;
        sizes[1] = size - sizes[0];