diff options
| author | Mark-PK Tsai <mark-pk.tsai@mediatek.com> | 2022-04-26 20:24:06 +0800 |
|---|---|---|
| committer | Alexander Grund <flamefire89@gmail.com> | 2024-01-06 12:14:57 +0100 |
| commit | c39aaece91aacc6d9f64dbfb3b0e83cd37db9476 (patch) | |
| tree | 5415e7e0abdbed6861a0d1aa3f6a154c95a3ef21 /net/core/netpoll.c | |
| parent | a44d6ad053b3cc8f3029620ff1e092ea885cc643 (diff) | |
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>
Change-Id: Icaa5bcb097b421d2459b082644f84031e89ac88b
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 'net/core/netpoll.c')
0 files changed, 0 insertions, 0 deletions