ring-buffer: Fix bytes_dropped calculation issue

[ Upstream commit c73f0b69648501978e8b3e8fa7eef7f4197d0481 ]

The calculation of bytes-dropped and bytes_dropped_nested is reversed.
Although it does not affect the final calculation of total_dropped,
it should still be modified.

Link: https://lore.kernel.org/20250223070106.6781-1-yangfeng59949@163.com
Fixes: 6c43e554a2a5 ("ring-buffer: Add ring buffer startup selftest")
Signed-off-by: Feng Yang <yangfeng@kylinos.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 61caff3d4091f7a89ca7746759b8472e5d29314c..62d93db72b0a9d10f97fa122680420d0b25074f7 100644 (file)
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -5995,9 +5995,9 @@ static __init int rb_write_something(struct rb_test_data *data, bool nested)
                /* Ignore dropped events before test starts. */
                if (started) {
                        if (nested)
-                               data->bytes_dropped += len;
-                       else
                                data->bytes_dropped_nested += len;
+                       else
+                               data->bytes_dropped += len;
                }
                return len;
        }