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| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-10-17 21:55:24 +0300 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2017-10-17 21:55:24 +0300 |
| commit | 6575257c60e1a26a5319ccf2b5ce5b6449001017 (patch) | |
| tree | b6404781ed926174017f99758ad84d57a1b19606 /certs | |
| parent | f39b536ce9248e9799ff900358d6f073ab2e6c55 (diff) | |
| download | linux-6575257c60e1a26a5319ccf2b5ce5b6449001017.tar.xz | |
tracing/samples: Fix creation and deletion of simple_thread_fn creation
Commit 7496946a8 ("tracing: Add samples of DECLARE_EVENT_CLASS() and
DEFINE_EVENT()") added template examples for all the events. It created a
DEFINE_EVENT_FN() example which reused the foo_bar_reg and foo_bar_unreg
functions.
Enabling both the TRACE_EVENT_FN() and DEFINE_EVENT_FN() example trace
events caused the foo_bar_reg to be called twice, creating the test thread
twice. The foo_bar_unreg would remove it only once, even if it was called
multiple times, leaving a thread existing when the module is unloaded,
causing an oops.
Add a ref count and allow foo_bar_reg() and foo_bar_unreg() be called by
multiple trace events.
Cc: stable@vger.kernel.org
Fixes: 7496946a8 ("tracing: Add samples of DECLARE_EVENT_CLASS() and DEFINE_EVENT()")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'certs')
0 files changed, 0 insertions, 0 deletions