[PATCH] ARM: smp: Fix missing backtrace IPI statics

[Russell King (Oracle)]

On Thu, Aug 01, 2024 at 05:40:22PM +0800, Jinjie Ruan wrote:
> It is similar to ARM64 commit 916b93f4e865 ("arm64: smp: Fix missing IPI
> statistics"), commit 56afcd3dbd19 ("ARM: Allow IPIs to be handled as normal
> interrupts") set CPU_BACKTRACE IPI "IRQ_HIDDEN" flag but not show it in
> show_ipi_list(), which cause the interrupt kstat_irqs accounting
> is missing in display.

I don't see why this needs to be included. If this IPI fires, it means
that the kernel has suffered a lockup and is probably not very useful.
So the chances of being able to read out from /proc/interrupts a non-
zero "CPU backtrace interrupts" figure is highly unlikely.

So, I don't see much point to this change.

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