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authorHeiko Carstens <heiko.carstens@de.ibm.com>2009-10-06 10:34:07 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2009-10-06 10:35:08 +0200
commit22ceaf408f22680b7448f2699567ba22202e6281 (patch)
treefeebff9b0b9691c64648eaf7ba1cc06ce83f5765 /arch
parent593c4f739859594dc4824b6d29f9abb1f0b3c669 (diff)
downloadop-kernel-dev-22ceaf408f22680b7448f2699567ba22202e6281.zip
op-kernel-dev-22ceaf408f22680b7448f2699567ba22202e6281.tar.gz
[S390] ftrace: drop nmi protection
The function graph tracer used to have a protection against NMI while entering a function entry tracing. But this is useless now, the tracer is reentrant and the ring buffer supports NMI tracing. Same as 07868b086cca784f4b532fc2ab574ec3a73b468a for x86. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/kernel/ftrace.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 57bdcb1..f5fe34d 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -185,9 +185,6 @@ unsigned long prepare_ftrace_return(unsigned long ip, unsigned long parent)
{
struct ftrace_graph_ent trace;
- /* Nmi's are currently unsupported. */
- if (unlikely(in_nmi()))
- goto out;
if (unlikely(atomic_read(&current->tracing_graph_pause)))
goto out;
if (ftrace_push_return_trace(parent, ip, &trace.depth, 0) == -EBUSY)
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