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tracing: Add tracing_reset_all_online_cpus_unlocked() function
authorSteven Rostedt (Google) <rostedt@goodmis.org>
Wed, 23 Nov 2022 19:25:57 +0000 (14:25 -0500)
committerSteven Rostedt (Google) <rostedt@goodmis.org>
Thu, 24 Nov 2022 00:06:11 +0000 (19:06 -0500)
commite18eb8783ec4949adebc7d7b0fdb65f65bfeefd9
tree5429f5bab9e6f442314e6b1feca76e3b0fea6002
parentef38c79a522b660f7f71d45dad2d6244bc741841
tracing: Add tracing_reset_all_online_cpus_unlocked() function

Currently the tracing_reset_all_online_cpus() requires the
trace_types_lock held. But only one caller of this function actually has
that lock held before calling it, and the other just takes the lock so
that it can call it. More users of this function is needed where the lock
is not held.

Add a tracing_reset_all_online_cpus_unlocked() function for the one use
case that calls it without being held, and also add a lockdep_assert to
make sure it is held when called.

Then have tracing_reset_all_online_cpus() take the lock internally, such
that callers do not need to worry about taking it.

Link: https://lkml.kernel.org/r/20221123192741.658273220@goodmis.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Zheng Yejian <zhengyejian1@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
kernel/trace/trace.c
kernel/trace/trace.h
kernel/trace/trace_events.c
kernel/trace/trace_events_synth.c