diff options
| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-11-22 05:21:33 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-22 09:03:42 +0100 |
| commit | 28889bf9e2db29747d58cd47a92d727f927c3aee (patch) | |
| tree | 7c5e0edd6e669ce0e3ab8a01fb6b381001bf1552 /kernel | |
| parent | tracing: Use the perf recursion protection from trace event (diff) | |
| download | linux-28889bf9e2db29747d58cd47a92d727f927c3aee.tar.xz linux-28889bf9e2db29747d58cd47a92d727f927c3aee.zip | |
tracing: Forget about the NMI buffer for syscall events
We are never in an NMI context when we commit a syscall trace to
perf. So just forget about the nmi buffer there.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jason Baron <jbaron@redhat.com>
LKML-Reference: <1258863695-10464-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_syscalls.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index 0bb934875263..41b6dd963daa 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -511,10 +511,7 @@ static void prof_syscall_enter(struct pt_regs *regs, long id) cpu = smp_processor_id(); - if (in_nmi()) - trace_buf = rcu_dereference(perf_trace_buf_nmi); - else - trace_buf = rcu_dereference(perf_trace_buf); + trace_buf = rcu_dereference(perf_trace_buf); if (!trace_buf) goto end; @@ -617,10 +614,7 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret) cpu = smp_processor_id(); - if (in_nmi()) - trace_buf = rcu_dereference(perf_trace_buf_nmi); - else - trace_buf = rcu_dereference(perf_trace_buf); + trace_buf = rcu_dereference(perf_trace_buf); if (!trace_buf) goto end; |