In SMP system, is there any api to disable IRQ for all CPUs?

[Rik van Riel]

On 10/01/2015 11:49 AM, loody wrote:
> hi all:
> is there any kernel API can let IRQ disable for all CPU in SMP system
> for a while?
> I just need it for a experiment on my module.
> 
> such as:
> xxxx      --> disable SMP all cpu IRQ
>   OOO   ---> no interrupt happen
>   OOO   ---> no interrupt happen
> zzzz      ---> enable SMP all cou IRQ

Look at the code in kernel/stop_machine.c

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