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authorPeter Zijlstra <peterz@infradead.org>2016-01-26 15:25:15 +0100
committerIngo Molnar <mingo@kernel.org>2016-01-29 08:35:36 +0100
commit5fa7c8ec57f70a7b5c6fe269fa9c51b9e465989c (patch)
treeb98a192b101a0813beb4f306925d887f30857842 /tools/perf/arch/x86/tests/intel-cqm.c
parentperf: Synchronously clean up child events (diff)
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perf: Remove/simplify lockdep annotation
Now that the perf_event_ctx_lock_nested() call has moved from put_event() into perf_event_release_kernel() the first reason is no longer valid as that can no longer happen. The second reason seems to have been invalidated when Al Viro made fput() unconditionally async in the following commit: 4a9d4b024a31 ("switch fput to task_work_add") such that munmap()->fput()->release()->perf_release() would no longer happen. Therefore, remove the annotation. This should increase the efficiency of lockdep coverage of perf locking. Suggested-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/arch/x86/tests/intel-cqm.c')
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