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| author |   Mark Brown <broonie@kernel.org> | 2015-11-10 19:01:58 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-11-10 19:01:58 +0000 |
| commit | 2a148b6f2726ced30f796435f61d6e915c979784 (patch) | |
| tree | 48d233fa5639677b16b10a3442029f3a2e40ef92 /kernel/trace/trace_stack.c | |
| parent | ASoC: rsnd: fixup SCU_SYS_INT_EN1 address (diff) | |
| parent | Merge remote-tracking branches 'asoc/topic/wm8904', 'asoc/topic/wm8955' and 'asoc/topic/wm8960' into asoc-next (diff) | |
| download | wireguard-linux-2a148b6f2726ced30f796435f61d6e915c979784.tar.xz wireguard-linux-2a148b6f2726ced30f796435f61d6e915c979784.zip | |
Merge tag 'asoc-v4.3-rc6' into asoc-fix-rcar
ASoC: Updates for v4.4
Not much core work here, a few small tweaks to interfaces but mainly the
changes here are driver ones. Highlights include:
- Updates to the topology userspace interface
- Big updates to the Renesas support from Morimoto-san
- Most of the support for Intel Sky Lake systems.
- New drivers for Asahi Kasei Microdevices AK4613, Allwinnner A10,
Cirrus Logic WM8998, Dialog DA7219, Nuvoton NAU8825 and Rockchip
S/PDIF.
Diffstat (limited to 'kernel/trace/trace_stack.c')
| -rw-r--r-- | kernel/trace/trace_stack.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c index b746399ab59c..8abf1ba18085 100644 --- a/kernel/trace/trace_stack.c +++ b/kernel/trace/trace_stack.c @@ -85,9 +85,19 @@ check_stack(unsigned long ip, unsigned long *stack) if (!object_is_on_stack(stack)) return; + /* Can't do this from NMI context (can cause deadlocks) */ + if (in_nmi()) + return; + local_irq_save(flags); arch_spin_lock(&max_stack_lock); + /* + * RCU may not be watching, make it see us. + * The stack trace code uses rcu_sched. + */ + rcu_irq_enter(); + /* In case another CPU set the tracer_frame on us */ if (unlikely(!frame_size)) this_size -= tracer_frame; @@ -169,6 +179,7 @@ check_stack(unsigned long ip, unsigned long *stack) } out: + rcu_irq_exit(); arch_spin_unlock(&max_stack_lock); local_irq_restore(flags); } |