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| author | Mark-PK Tsai <mark-pk.tsai@mediatek.com> | 2022-04-26 20:24:06 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-14 18:32:38 +0200 |
| commit | 9e801c891aa2a002aa2b4259459c1d09f24e75b9 (patch) | |
| tree | db0d20c09a52203979e3672f44d660200055bbdf /drivers/pwm/pwm-sprd.c | |
| parent | 1788e6dbb61286215442b1af99e51405a6206762 (diff) | |
| download | linux-stable-9e801c891aa2a002aa2b4259459c1d09f24e75b9.tar.gz linux-stable-9e801c891aa2a002aa2b4259459c1d09f24e75b9.tar.bz2 linux-stable-9e801c891aa2a002aa2b4259459c1d09f24e75b9.zip | |
tracing: Avoid adding tracer option before update_tracer_options
[ Upstream commit ef9188bcc6ca1d8a2ad83e826b548e6820721061 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/pwm/pwm-sprd.c')
0 files changed, 0 insertions, 0 deletions