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| author | Takashi Iwai <tiwai@suse.de> | 2016-03-08 09:49:43 (GMT) |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2016-03-08 09:49:43 (GMT) |
| commit | 56d94d70398f0fbb1863a03a145db1a86f009a71 (patch) | |
| tree | 9e52dc537f8f8359c70b66f5000192bb280b41b9 /arch/arm64/kernel/traps.c | |
| parent | bb63f726f98bec032c7322a9c36eb4167307d856 (diff) | |
| parent | fc4f000bf8c0cbf38f44de6bd5e225574e572ed4 (diff) | |
| download | linux-56d94d70398f0fbb1863a03a145db1a86f009a71.tar.xz | |
Merge branch 'topic/hda' into for-next
Diffstat (limited to 'arch/arm64/kernel/traps.c')
| -rw-r--r-- | arch/arm64/kernel/traps.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index cbedd72..c539208 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -146,9 +146,18 @@ static void dump_instr(const char *lvl, struct pt_regs *regs) static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk) { struct stackframe frame; - unsigned long irq_stack_ptr = IRQ_STACK_PTR(smp_processor_id()); + unsigned long irq_stack_ptr; int skip; + /* + * Switching between stacks is valid when tracing current and in + * non-preemptible context. + */ + if (tsk == current && !preemptible()) + irq_stack_ptr = IRQ_STACK_PTR(smp_processor_id()); + else + irq_stack_ptr = 0; + pr_debug("%s(regs = %p tsk = %p)\n", __func__, regs, tsk); if (!tsk) |