mm: fix off-by-two in __zone_watermark_ok()

[platform/adaptation/renesas_rcar/renesas_kernel.git] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4f95bcf..59153da 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1525,7 +1525,7 @@ static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark,
        long min = mark;
        int o;
 
-       free_pages -= (1 << order) + 1;
+       free_pages -= (1 << order) - 1;
        if (alloc_flags & ALLOC_HIGH)
                min -= min / 2;
        if (alloc_flags & ALLOC_HARDER)