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Commit 28889bf9 authored by Frederic Weisbecker's avatar Frederic Weisbecker Committed by Ingo Molnar
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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: default avatarFrederic 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: default avatarIngo Molnar <mingo@elte.hu>
parent ce71b9df

kernel/trace/trace_syscalls.c

+2 −8
Original line number Diff line number Diff line
@@ -511,9 +511,6 @@ 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);



	if (!trace_buf)
@@ -617,9 +614,6 @@ 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);



	if (!trace_buf)