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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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132cd887b5
This patch allows unwind_frame() to traverse from interrupt stack to task stack correctly. It requires data from a dummy stack frame, created during irq_stack_entry(), added by a later patch. A similar approach is taken to modify dump_backtrace(), which expects to find struct pt_regs underneath any call to functions marked __exception. When on an irq_stack, the struct pt_regs is stored on the old task stack, the location of which is stored in the dummy stack frame. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> [james.morse: merged two patches, reworked for per_cpu irq_stacks, and no alignment guarantees, added irq_stack definitions] Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> |
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