[v2,1/3] powerpc: use NMI IPI for smp_send_stop

[Michael Ellerman]

On Sun, 2018-04-01 at 10:36:13 UTC, Nicholas Piggin wrote:
> Use the NMI IPI rather than smp_call_function for smp_send_stop.
> Have stopped CPUs hard disable interrupts rather than just soft
> disable.
> 
> This function is used in crash/panic/shutdown paths to bring other
> CPUs down as quickly and reliably as possible, and minimizing their
> potential to cause trouble.
> 
> Avoiding the Linux smp_call_function infrastructure and (if supported)
> using true NMI IPIs makes this more robust.
> 
> Signed-off-by: Nicholas Piggin <npiggin at gmail.com>

Series applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/6bed3237624e3faad1592543952907

cheers