mm: refactor zone_movable_is_highmem()
All callers of zone_movable_is_highmem are under #ifdef CONFIG_HIGHMEM,
so the else branch return 0 is not needed.
Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 2782df4..54d74f6 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -842,16 +842,16 @@
extern int movable_zone;
+#ifdef CONFIG_HIGHMEM
static inline int zone_movable_is_highmem(void)
{
-#if defined(CONFIG_HIGHMEM) && defined(CONFIG_HAVE_MEMBLOCK_NODE_MAP)
+#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
return movable_zone == ZONE_HIGHMEM;
-#elif defined(CONFIG_HIGHMEM)
- return (ZONE_MOVABLE - 1) == ZONE_HIGHMEM;
#else
- return 0;
+ return (ZONE_MOVABLE - 1) == ZONE_HIGHMEM;
#endif
}
+#endif
static inline int is_highmem_idx(enum zone_type idx)
{