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| author | Alex Shi <alex.shi@linaro.org> | 2016-04-13 12:02:21 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2016-04-13 12:02:21 +0800 |
| commit | 08562bfcb85748c69e5824fc6d1d77d5725787e4 (patch) | |
| tree | 905e39ccad43e244dbb09d4eccce1c91e0facce0 /kernel/trace/trace_irqsoff.c | |
| parent | 9fe9bdd75b2ad9ed25152fce02f41fe63c542e8a (diff) | |
| parent | ad592b70ae97800d4f5bf535d45a680649e2789e (diff) | |
Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android
Diffstat (limited to 'kernel/trace/trace_irqsoff.c')
| -rw-r--r-- | kernel/trace/trace_irqsoff.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c index e4e56589ec1d..be3222b7d72e 100644 --- a/kernel/trace/trace_irqsoff.c +++ b/kernel/trace/trace_irqsoff.c @@ -109,8 +109,12 @@ static int func_prolog_dec(struct trace_array *tr, return 0; local_save_flags(*flags); - /* slight chance to get a false positive on tracing_cpu */ - if (!irqs_disabled_flags(*flags)) + /* + * Slight chance to get a false positive on tracing_cpu, + * although I'm starting to think there isn't a chance. + * Leave this for now just to be paranoid. + */ + if (!irqs_disabled_flags(*flags) && !preempt_count()) return 0; *data = per_cpu_ptr(tr->trace_buffer.data, cpu); |