[PATCH 3/6] ring-buffer: Free cpu_buffer->free_page with subbuf_order

[Vincent Donnefort]

When sub-buffers use an order greater than 0, cpu_buffer->free_page is
allocated with subbuf_order. Use the correct order for
cpu_buffer->free_page.

Fixes: f9b94daa542a ("ring-buffer: Set new size of the ring buffer sub page")
Reported-by: Sashiko <sashiko-...@kernel.org>
Signed-off-by: Vincent Donnefort <vdonnef...@google.com>

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 026658c70351..ac5f5d9502dd 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -2654,7 +2654,7 @@ static void rb_free_cpu_buffer(struct ring_buffer_per_cpu 
*cpu_buffer)
                free_buffer_page(bpage);
        }
 
-       free_page((unsigned long)cpu_buffer->free_page);
+       free_pages((unsigned long)cpu_buffer->free_page, 
cpu_buffer->buffer->subbuf_order);
 
        kfree(cpu_buffer);
 }
-- 
2.55.0.654.g21b8a5bc05-goog