Re: [PATCH 1/6] amdgpu: a NULL ->mm does not mean a thread is a kthread

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Am 2020-04-04 um 5:40 a.m. schrieb Christoph Hellwig:
> Use the proper API instead.
>
> Fixes: 70539bd795002 ("drm/amd: Update MEC HQD loading code for KFD")
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>


> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> index 13feb313e9b3..4db143c19dcc 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
> @@ -190,7 +190,7 @@ uint8_t amdgpu_amdkfd_get_xgmi_hops_count(struct kgd_dev *dst, struct kgd_dev *s
>  			pagefault_disable();				\
>  			if ((mmptr) == current->mm) {			\
>  				valid = !get_user((dst), (wptr));	\
> -			} else if (current->mm == NULL) {		\
> +			} else if (current->flags & PF_KTHREAD) {	\
>  				use_mm(mmptr);				\
>  				valid = !get_user((dst), (wptr));	\
>  				unuse_mm(mmptr);			\
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