arm64: make irq_stack_ptr more robust

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Switching between stacks is only valid if we are tracing ourselves while on the
irq_stack, so it is only valid when in current and non-preemptible context,
otherwise is is just zeroed off.

Fixes: 132cd887b5 ("arm64: Modify stack trace and dump for use with irq_stack")
Acked-by: James Morse <james.morse@arm.com>
Tested-by: James Morse <james.morse@arm.com>
Signed-off-by: Yang Shi <yang.shi@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Yang Shi 2016-02-11 13:53:10 -08:00 • committed by Will Deacon

parent e04a28d45f

commit a80a0eb70c

2 changed files with 16 additions and 8 deletions

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13

arch/arm64/kernel/stacktrace.c

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11

arch/arm64/kernel/traps.c

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