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| author | Mark-PK Tsai <mark-pk.tsai@mediatek.com> | 2022-04-26 15:24:06 +0300 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-04-27 00:58:52 +0300 |
| commit | ef9188bcc6ca1d8a2ad83e826b548e6820721061 (patch) | |
| tree | 4504d88904fb9e54239b753fdd344bbcd6310c8e /drivers/usb/cdns3/cdns3-debug.h | |
| parent | ed888241a0ab9a3606bd986be6f0abafa1afdf19 (diff) | |
| download | linux-ef9188bcc6ca1d8a2ad83e826b548e6820721061.tar.xz | |
tracing: Avoid adding tracer option before update_tracer_options
To prepare for support asynchronous tracer_init_tracefs initcall,
avoid calling create_trace_option_files before __update_tracer_options.
Otherwise, create_trace_option_files will show warning because
some tracers in trace_types list are already in tr->topts.
For example, hwlat_tracer call register_tracer in late_initcall,
and global_trace.dir is already created in tracing_init_dentry,
hwlat_tracer will be put into tr->topts.
Then if the __update_tracer_options is executed after hwlat_tracer
registered, create_trace_option_files find that hwlat_tracer is
already in tr->topts.
Link: https://lkml.kernel.org/r/20220426122407.17042-2-mark-pk.tsai@mediatek.com
Link: https://lore.kernel.org/lkml/20220322133339.GA32582@xsang-OptiPlex-9020/
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-debug.h')
0 files changed, 0 insertions, 0 deletions