Re: [PATCH] [PATCH] x86: Restore proper vector locking during cpuhotplug

[H. Peter Anvin]

Eric W. Biederman wrote:
> Having cpu_online_map change during assign_irq_vector can result
> in some really nasty and weird things happening.  The one that
> bit me last time was accessing non existent per cpu memory for non
> existent cpus.
>
> This locking was removed in a sloppy x86_64 and x86_32 merge patch.
>
> Guys can we please try and avoid subtly breaking x86 when we are
> merging files together?

Queuing for tip:x86/urgent.

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