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| author | Takashi Iwai <tiwai@suse.de> | 2017-12-27 09:02:02 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-12-27 09:02:02 +0100 |
| commit | 7ad3423ebb02f340671f70a916bdc8dbec7573ee (patch) | |
| tree | b9168d363c24f2af2626e63011ec1f6c81e81d09 /kernel/trace/trace_stack.c | |
| parent | 56a23ee52611ca76421f3d7cac100e1616716dae (diff) | |
| parent | 44be77c590f381bc629815ac789b8b15ecc4ddcf (diff) | |
Merge branch 'for-linus' into for-next
Back-merge the upstream branch for applying further cleanup patches
for HD-Audio.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'kernel/trace/trace_stack.c')
| -rw-r--r-- | kernel/trace/trace_stack.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c index 734accc02418..3c7bfc4bf5e9 100644 --- a/kernel/trace/trace_stack.c +++ b/kernel/trace/trace_stack.c @@ -209,6 +209,10 @@ stack_trace_call(unsigned long ip, unsigned long parent_ip, if (__this_cpu_read(disable_stack_tracer) != 1) goto out; + /* If rcu is not watching, then save stack trace can fail */ + if (!rcu_is_watching()) + goto out; + ip += MCOUNT_INSN_SIZE; check_stack(ip, &stack); |