xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

tracing: Add tracing_reset_all_online_cpus_unlocked() function

Browse Source 
commit e18eb8783ec4949adebc7d7b0fdb65f65bfeefd9 upstream.

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>
Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Steven Rostedt (Google)
2022-11-23 14:25:57 -05:00
committed by Greg Kroah-Hartman
parent 9ced730490
commit db4ab0c97a
4 changed files with 12 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
kernel/trace/trace_events.c
View File

@@ -2661,7 +2661,7 @@ static void trace_module_remove_events(struct module *mod)
* over from this module may be passed to the new module events and
* unexpected results may occur.
*/
tracing_reset_all_online_cpus();
tracing_reset_all_online_cpus_unlocked();
}
static int trace_module_notify(struct notifier_block *self,