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ring-buffer: Fix ring buffer size in rb_write_something() 

'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>
This commit is contained in:
YueHaibing 2018-09-23 12:11:33 +00:00 committed by Steven Rostedt (VMware)
parent 79a3aaa7b8
commit 40ed29b373
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/ring_buffer.c
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@ -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);