mm/page_alloc.c: use free_area_empty() instead of open-coding

Use free_area_empty() API to replace list_empty() for better code
readability.

Signed-off-by: chenqiwu <chenqiwu@xiaomi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: http://lkml.kernel.org/r/1583674354-7713-1-git-send-email-qiwuchen55@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2dedf5a..2a7d77b 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3460,8 +3460,7 @@ bool __zone_watermark_ok(struct zone *z, unsigned int order, unsigned long mark,
                        return true;
                }
 #endif
-               if (alloc_harder &&
-                       !list_empty(&area->free_list[MIGRATE_HIGHATOMIC]))
+               if (alloc_harder && !free_area_empty(area, MIGRATE_HIGHATOMIC))
                        return true;
        }
        return false;