Tracing fixes and updates for 6.0:

- Do not stop trace events in modules if TAINT_TEST is set

- Do not clobber mount options when tracefs is mounted a second time

- Prevent crash of kprobes in gate area

- Add static annotation to some non global functions

- Add some entries into the MAINTAINERS file

- Fix check of event_mutex held when accessing trigger list

- Add some __init/__exit annotations

- Fix reporting of what called hardirq_{enable,disable}_ip function
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