[PATCH v3 41/57] perf: Simplify __perf_event_output()
From: Peter Zijlstra <peterz@infradead.org>
Date: 2023-06-12 10:00:23
Also in:
dmaengine, linux-kbuild, linux-perf-users, lkml, llvm, rcu
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- kernel/events/core.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c@@ -7739,22 +7739,17 @@ __perf_event_output(struct perf_event *e int err; /* protect the callchain buffers */ - rcu_read_lock(); + guard(rcu)(); perf_prepare_sample(data, event, regs); perf_prepare_header(&header, data, event, regs); - err = output_begin(&handle, data, event, header.size); if (err) - goto exit; - + return err; perf_output_sample(&handle, &header, data, event); - perf_output_end(&handle); -exit: - rcu_read_unlock(); - return err; + return 0; } void