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Date: Thu, 6 Aug 2009 08:27:33 +0200 From: Frederic Weisbecker <fweisbec@...il.com> To: Ingo Molnar <mingo@...e.hu> Cc: LKML <linux-kernel@...r.kernel.org>, Frederic Weisbecker <fweisbec@...il.com>, Lai Jiangshan <laijs@...fujitsu.com>, Li Zefan <lizf@...fujitsu.com>, Steven Rostedt <rostedt@...dmis.org> Subject: [PATCH 2/7] tracing/function-graph-tracer: Drop the useless nmi protection The function graph tracer used to have a protection against NMI while entering a function entry tracing. But this is useless now, this tracer is reentrant and the ring buffer supports the NMI tracing. We can then drop this protection. Signed-off-by: Frederic Weisbecker <fweisbec@...il.com> Cc: Steven Rostedt <rostedt@...dmis.org> --- arch/x86/kernel/ftrace.c | 4 ---- 1 files changed, 0 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index d94e1ea..8e96634 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -417,10 +417,6 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, unsigned long return_hooker = (unsigned long) &return_to_handler; - /* Nmi's are currently unsupported */ - if (unlikely(in_nmi())) - return; - if (unlikely(atomic_read(¤t->tracing_graph_pause))) return; -- 1.6.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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