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-rw-r--r--kernel/events/ring_buffer.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c
index c8aa3f75bc4d..182bc30899d5 100644
--- a/kernel/events/ring_buffer.c
+++ b/kernel/events/ring_buffer.c
@@ -437,7 +437,10 @@ static struct page *rb_alloc_aux_page(int node, int order)
if (page && order) {
/*
- * Communicate the allocation size to the driver
+ * Communicate the allocation size to the driver:
+ * if we managed to secure a high-order allocation,
+ * set its first page's private to this order;
+ * !PagePrivate(page) means it's just a normal page.
*/
split_page(page, order);
SetPagePrivate(page);