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I was attempting to use pid filtering with function_graph, but it wasn't
allowing anything to make it through. Turns out ftrace_trace_task
returns false if ftrace_ignore_pid is not-empty, which isn't correct
anymore. We're now setting it to FTRACE_PID_IGNORE if we need to ignore
that pid, otherwise it's set to the pid (which is weird considering the
name) or to FTRACE_PID_TRACE. Fix the check to check for !=
FTRACE_PID_IGNORE. With this we can now use function_graph with pid
filtering.
Link: https://lkml.kernel.org/r/[email protected]
Fixes: 717e3f5 ("ftrace: Make function trace pid filtering a bit more exact")
Signed-off-by: Josef Bacik <[email protected]>
Signed-off-by: Steven Rostedt (VMware) <[email protected]>
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