tree a0fda0517271586316fbd476aed280734a245151
parent e04a28d45ff343b47a4ffc4dee3a3e279e76ddfa
author Yang Shi <yang.shi@linaro.org> 1455227590 -0800
committer Will Deacon <will.deacon@arm.com> 1455292431 +0000

arm64: make irq_stack_ptr more robust

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: 132cd887b5c5 ("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>