ftrace: Remove use of control list and ops

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Currently perf has its own list function within the ftrace infrastructure
that seems to be used only to allow for it to have per-cpu disabling as well
as a check to make sure that it's not called while RCU is not watching. It
uses something called the "control_ops" which is used to iterate over ops
under it with the control_list_func().

The problem is that this control_ops and control_list_func unnecessarily
complicates the code. By replacing FTRACE_OPS_FL_CONTROL with two new flags
(FTRACE_OPS_FL_RCU and FTRACE_OPS_FL_PER_CPU) we can remove all the code
that is special with the control ops and add the needed checks within the
generic ftrace_list_func().

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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This commit is contained in:

Steven Rostedt (Red Hat) 2015-11-30 17:23:39 -05:00 • committed by Steven Rostedt

parent 030f4e1cb8

commit ba27f2bc73

4 changed files with 57 additions and 108 deletions

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35

include/linux/ftrace.h

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126

kernel/trace/ftrace.c

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2

kernel/trace/trace.h

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2

kernel/trace/trace_event_perf.c

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