# Re: \[PATCH v3 38/41\] powerpc: convert put\_page() to put\_user\_page\*()

- From: Michael Ellerman \<mpe@ellerman.id.au\>
- Date: 2019-08-08 05:42:51 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2019/08/160715
- Thread: https://ratatoskr.run/amd-gfx/2019/08/160658/t.md

```text
Hi John,

john.hubbard@gmail.com writes:
> diff --git a/arch/powerpc/mm/book3s64/iommu_api.c b/arch/powerpc/mm/book3s64/iommu_api.c
> index b056cae3388b..e126193ba295 100644
> --- a/arch/powerpc/mm/book3s64/iommu_api.c
> +++ b/arch/powerpc/mm/book3s64/iommu_api.c
> @@ -203,6 +202,7 @@ static void mm_iommu_unpin(struct mm_iommu_table_group_mem_t *mem)
>  {
>  	long i;
>  	struct page *page = NULL;
> +	bool dirty = false;

I don't think you need that initialisation do you?

>  	if (!mem->hpas)
>  		return;
> @@ -215,10 +215,9 @@ static void mm_iommu_unpin(struct mm_iommu_table_group_mem_t *mem)
>  		if (!page)
>  			continue;
>  
> -		if (mem->hpas[i] & MM_IOMMU_TABLE_GROUP_PAGE_DIRTY)
> -			SetPageDirty(page);
> +		dirty = mem->hpas[i] & MM_IOMMU_TABLE_GROUP_PAGE_DIRTY;
> -		put_page(page);
> +		put_user_pages_dirty_lock(&page, 1, dirty);
>  		mem->hpas[i] = 0;
>  	}
>  }

cheers

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
```