[for-next][PATCH 01/19] ring-buffer: Fix ring buffer size in rb_write_something()

Steven Rostedt
2019-04-04T01:37:46Z

From: YueHaibing <yuehaibing@huawei.com>

'cnt' should be used to calculate ring buffer size rather than data->cnt

Link: http://lkml.kernel.org/r/1537704693-184237-1-git-send-email-yuehaibing@huawei.com

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
kernel/trace/ring_buffer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 41b6f96e5366..4f33d7d841af 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -4979,7 +4979,7 @@ static __init int rb_write_something(struct rb_test_data *data, bool nested)
cnt = data->cnt + (nested ? 27 : 0);

/* Multiply cnt by ~e, to make some unique increment */
- size = (data->cnt * 68 / 25) % (sizeof(rb_string) - 1);
+ size = (cnt * 68 / 25) % (sizeof(rb_string) - 1);

len = size + sizeof(struct rb_item);

--
2.20.1