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>
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1 changed files with 2 additions and 8 deletions
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@ -511,10 +511,7 @@ static void prof_syscall_enter(struct pt_regs *regs, long id)
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cpu = smp_processor_id();
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if (in_nmi())
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trace_buf = rcu_dereference(perf_trace_buf_nmi);
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else
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trace_buf = rcu_dereference(perf_trace_buf);
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trace_buf = rcu_dereference(perf_trace_buf);
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if (!trace_buf)
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goto end;
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@ -617,10 +614,7 @@ static void prof_syscall_exit(struct pt_regs *regs, long ret)
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cpu = smp_processor_id();
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if (in_nmi())
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trace_buf = rcu_dereference(perf_trace_buf_nmi);
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else
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trace_buf = rcu_dereference(perf_trace_buf);
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trace_buf = rcu_dereference(perf_trace_buf);
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if (!trace_buf)
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goto end;
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