From: Robin Murphy <robin.murphy@arm.com>
To: Christoph Hellwig <hch@lst.de>, Tony Luck <tony.luck@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
iommu@lists.linux-foundation.org
Cc: linux-mips@vger.kernel.org, linux-ia64@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org
Subject: Re: [PATCH 07/12] dma-direct: lift gfp_t manipulation out of__dma_direct_alloc_pages
Date: Thu, 10 Sep 2020 14:02:01 +0100 [thread overview]
Message-ID: <3658a0b7-c2b7-8b03-86c6-219f77799999@arm.com> (raw)
In-Reply-To: <20200908164758.3177341-8-hch@lst.de>
On 2020-09-08 17:47, Christoph Hellwig wrote:
> Move the detailed gfp_t setup from __dma_direct_alloc_pages into the
> caller to clean things up a little.
Other than a mild nitpick that it might be nicer to spend one extra line
to keep both gfp adjustments next to each other,
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> kernel/dma/direct.c | 12 +++++-------
> 1 file changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> index 1d564bea58571b..12e9f5f75dfe4b 100644
> --- a/kernel/dma/direct.c
> +++ b/kernel/dma/direct.c
> @@ -108,7 +108,7 @@ static inline bool dma_should_free_from_pool(struct device *dev,
> }
>
> static struct page *__dma_direct_alloc_pages(struct device *dev, size_t size,
> - gfp_t gfp, unsigned long attrs)
> + gfp_t gfp)
> {
> int node = dev_to_node(dev);
> struct page *page = NULL;
> @@ -116,11 +116,6 @@ static struct page *__dma_direct_alloc_pages(struct device *dev, size_t size,
>
> WARN_ON_ONCE(!PAGE_ALIGNED(size));
>
> - if (attrs & DMA_ATTR_NO_WARN)
> - gfp |= __GFP_NOWARN;
> -
> - /* we always manually zero the memory once we are done: */
> - gfp &= ~__GFP_ZERO;
> gfp |= dma_direct_optimal_gfp_mask(dev, dev->coherent_dma_mask,
> &phys_limit);
> page = dma_alloc_contiguous(dev, size, gfp);
> @@ -164,6 +159,8 @@ void *dma_direct_alloc(struct device *dev, size_t size,
> return arch_dma_alloc(dev, size, dma_handle, gfp, attrs);
>
> size = PAGE_ALIGN(size);
> + if (attrs & DMA_ATTR_NO_WARN)
> + gfp |= __GFP_NOWARN;
>
> if (dma_should_alloc_from_pool(dev, gfp, attrs)) {
> u64 phys_mask;
> @@ -177,7 +174,8 @@ void *dma_direct_alloc(struct device *dev, size_t size,
> goto done;
> }
>
> - page = __dma_direct_alloc_pages(dev, size, gfp, attrs);
> + /* we always manually zero the memory once we are done */
> + page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO);
> if (!page)
> return NULL;
>
>
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next prev parent reply other threads:[~2020-09-10 13:02 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-08 16:47 dma-mapping cleanups Christoph Hellwig
2020-09-08 16:47 ` [PATCH 01/12] MIPS: make dma_sync_*_for_cpu a little less overzealous Christoph Hellwig
2020-09-08 16:47 ` [PATCH 02/12] MIPS/jazzdma: remove the unused vdma_remap function Christoph Hellwig
2020-09-08 16:47 ` [PATCH 03/12] MIPS/jazzdma: decouple from dma-direct Christoph Hellwig
2020-09-08 16:47 ` [PATCH 04/12] dma-mapping: fix DMA_OPS dependencies Christoph Hellwig
2020-09-08 18:04 ` Sergei Shtylyov
2020-09-11 7:10 ` Christoph Hellwig
2020-09-10 12:55 ` Robin Murphy
2020-09-11 7:09 ` Christoph Hellwig
2020-09-08 16:47 ` [PATCH 05/12] dma-mapping: add (back) arch_dma_mark_clean for ia64 Christoph Hellwig
2020-09-08 16:47 ` [PATCH 06/12] dma-direct: remove dma_direct_{alloc,free}_pages Christoph Hellwig
2020-09-10 12:57 ` Robin Murphy
2020-09-08 16:47 ` [PATCH 07/12] dma-direct: lift gfp_t manipulation out of__dma_direct_alloc_pages Christoph Hellwig
2020-09-10 13:02 ` Robin Murphy [this message]
2020-09-08 16:47 ` [PATCH 08/12] dma-direct: use phys_to_dma_direct in dma_direct_alloc Christoph Hellwig
2020-09-10 13:03 ` Robin Murphy
2020-09-08 16:47 ` [PATCH 09/12] dma-direct: remove __dma_to_phys Christoph Hellwig
2020-09-10 13:26 ` Robin Murphy
2020-09-11 7:14 ` Christoph Hellwig
2020-09-08 16:47 ` [PATCH 10/12] dma-direct: rename and cleanup __phys_to_dma Christoph Hellwig
2020-09-10 13:30 ` Robin Murphy
2020-09-08 16:47 ` [PATCH 11/12] dma-mapping: move dma_common_{mmap, get_sgtable} out of mapping.c Christoph Hellwig
2020-09-10 13:34 ` Robin Murphy
2020-09-11 7:15 ` [PATCH 11/12] dma-mapping: move dma_common_{mmap,get_sgtable} " Christoph Hellwig
2020-09-08 16:47 ` [PATCH 12/12] dma-mapping: move the dma_declare_coherent_memory documentation Christoph Hellwig
2020-09-10 13:51 ` Robin Murphy
2020-09-11 7:17 ` Christoph Hellwig
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