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    SubjectRe: [PATCH 1/1] arm/stacktrace: stop unwinding after an invalid address.
    On Tue, Oct 24, 2017 at 05:16:42PM +0530, Maninder Singh wrote:
    > This patch stops unwinding backtrace in case of below 2 cases.
    >
    > (Issue observed while porting stackdepot on ARM, duplicate
    > entries created in stackdepot
    > reference patch for workaround in stackdepot:-
    > https://lkml.org/lkml/2017/10/11/353
    > ).
    >
    > 1. If address belongs to irq/exception code, ignore it.
    > save_stack+0x40/0xec
    > __set_page_owner+0x2c/0x64
    > ....
    > ....
    > __handle_domain_irq+0x9c/0x130
    > gic_handle_irq+0x40/0x80
    > __irq_usr+0x4c/0x60
    > 0xb6507818
    > ^^^^^^^

    However, we _do_ want to trace through an IRQ taken in SVC mode, but you
    completely remove all that code. So, not taking this patch, sorry.

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