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authorFrederic Weisbecker <fweisbec@gmail.com>2009-07-29 03:33:51 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2009-08-06 07:28:05 +0200
commit07868b086cca784f4b532fc2ab574ec3a73b468a (patch)
tree38678a56d6d401ebc710e41096f6aed04c17ba0b /arch
parent0c9e6f639aed490202bbc79214f4495cf4bfde58 (diff)
downloadop-kernel-dev-07868b086cca784f4b532fc2ab574ec3a73b468a.zip
op-kernel-dev-07868b086cca784f4b532fc2ab574ec3a73b468a.tar.gz
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@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/ftrace.c4
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(&current->tracing_graph_pause)))
return;
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