diff options
| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2018-11-06 18:44:52 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2018-11-27 09:21:41 -0800 |
| commit | 7440172974e85b1828bdd84ac6b23b5bcad9c5eb (patch) | |
| tree | 876817c8e09a9f55ffac2ae0fd4ad0d53040100f /kernel/trace/trace.c | |
| parent | c93ffc15cceb057924410f9178e679120ee12353 (diff) | |
| download | linux-7440172974e85b1828bdd84ac6b23b5bcad9c5eb.tar.gz linux-7440172974e85b1828bdd84ac6b23b5bcad9c5eb.tar.bz2 linux-7440172974e85b1828bdd84ac6b23b5bcad9c5eb.zip | |
tracing: Replace synchronize_sched() and call_rcu_sched()
Now that synchronize_rcu() waits for preempt-disable regions of code
as well as RCU read-side critical sections, synchronize_sched() can
be replaced by synchronize_rcu(). Similarly, call_rcu_sched() can be
replaced by call_rcu(). This commit therefore makes these changes.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: <linux-kernel@vger.kernel.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index ff1c4b20cd0a..51612b4a603f 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1681,7 +1681,7 @@ void tracing_reset(struct trace_buffer *buf, int cpu) ring_buffer_record_disable(buffer); /* Make sure all commits have finished */ - synchronize_sched(); + synchronize_rcu(); ring_buffer_reset_cpu(buffer, cpu); ring_buffer_record_enable(buffer); @@ -1698,7 +1698,7 @@ void tracing_reset_online_cpus(struct trace_buffer *buf) ring_buffer_record_disable(buffer); /* Make sure all commits have finished */ - synchronize_sched(); + synchronize_rcu(); buf->time_start = buffer_ftrace_now(buf, buf->cpu); @@ -2250,7 +2250,7 @@ void trace_buffered_event_disable(void) preempt_enable(); /* Wait for all current users to finish */ - synchronize_sched(); + synchronize_rcu(); for_each_tracing_cpu(cpu) { free_page((unsigned long)per_cpu(trace_buffered_event, cpu)); @@ -5398,7 +5398,7 @@ static int tracing_set_tracer(struct trace_array *tr, const char *buf) if (tr->current_trace->reset) tr->current_trace->reset(tr); - /* Current trace needs to be nop_trace before synchronize_sched */ + /* Current trace needs to be nop_trace before synchronize_rcu */ tr->current_trace = &nop_trace; #ifdef CONFIG_TRACER_MAX_TRACE @@ -5412,7 +5412,7 @@ static int tracing_set_tracer(struct trace_array *tr, const char *buf) * The update_max_tr is called from interrupts disabled * so a synchronized_sched() is sufficient. */ - synchronize_sched(); + synchronize_rcu(); free_snapshot(tr); } #endif |