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tracing/function-graph-tracer: Drop the useless nmi protection

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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@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Frederic Weisbecker 2009-07-29 03:33:51 +02:00
parent 0c9e6f639a
commit 07868b086c
1 changed files with 0 additions and 4 deletions
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4
arch/x86/kernel/ftrace.c
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@ -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(&current->tracing_graph_pause)))
return;