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SubjectRe: [djiang:cxl-security 1/19] include/linux/memregion.h:54:9: error: implicit declaration of function 'WARN_ON_ONCE'
On Thu, 22 Sep 2022, kernel test robot wrote:
>
> 51
> 52 int cpu_cache_invalidate_memregion(int res_desc)
> 53 {
> > 54 WARN_ON_ONCE("CPU cache invalidation required");
>

Looks like memregion.h needs to include kernel.h. I'll send a new version
along with EOPNOTSUPP return.

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