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Date: Wed, 23 Sep 2026 11:35:45 +0100
From: Catalin Marinas <catalin.marinas@arm.com>
To: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
Cc: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev,
	linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
	iommu@lists.linux.dev, Andrew Morton <akpm@linux-foundation.org>,
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Subject: Re: [RFC PATCH v7 06/13] dma-contiguous: Accept an explicit minimum
 alignment
Message-ID: <arOrgRfi1k12clT7@arm.com>
References: <20260921144847.501151-1-aneesh.kumar@kernel.org>
 <20260921144847.501151-7-aneesh.kumar@kernel.org>
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In-Reply-To: <20260921144847.501151-7-aneesh.kumar@kernel.org>

On Mon, Sep 21, 2026 at 08:18:40PM +0530, Aneesh Kumar K.V (Arm) wrote:
> @@ -125,7 +126,8 @@ static inline int dma_contiguous_reserve_area(phys_addr_t size,
>  	return -ENOSYS;
>  }
>  static inline struct page *dma_alloc_from_contiguous(struct device *dev,
> -		size_t count, unsigned int order, bool no_warn)
> +		size_t count, unsigned int order, unsigned int required_order,
> +		bool no_warn)
>  {
>  	return NULL;
>  }
> @@ -136,7 +138,7 @@ static inline bool dma_release_from_contiguous(struct device *dev,
>  }
>  /* Use fallback alloc() and free() when CONFIG_DMA_CMA=n */
>  static inline struct page *dma_alloc_contiguous(struct device *dev, size_t size,
> -		gfp_t gfp)
> +		gfp_t gfp, unsigned int align_order)

Can we not just bake the alignment further down in these functions
rather than getting the callers to pass the {required,align}_order?

-- 
Catalin