From: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>,
Robin Murphy <robin.murphy@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Will Deacon" <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Herbert Xu <herbert@gondor.apana.org.au>,
"Ard Biesheuvel" <ardb@kernel.org>,
Isaac Manjarres <isaacmanjarres@google.com>,
Saravana Kannan <saravanak@google.com>,
Alasdair Kergon <agk@redhat.com>, Daniel Vetter <daniel@ffwll.ch>,
"Joerg Roedel" <joro@8bytes.org>, Mark Brown <broonie@kernel.org>,
Mike Snitzer <snitzer@kernel.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Jonathan Cameron" <jic23@kernel.org>, <linux-mm@kvack.org>,
<iommu@lists.linux.dev>, <linux-arm-kernel@lists.infradead.org>,
Lars-Peter Clausen <lars@metafoo.de>
Subject: Re: [PATCH v6 10/17] iio: core: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN
Date: Fri, 2 Jun 2023 12:19:39 +0100 [thread overview]
Message-ID: <20230602121939.00000e20@Huawei.com> (raw)
In-Reply-To: <20230531154836.1366225-11-catalin.marinas@arm.com>
On Wed, 31 May 2023 16:48:29 +0100
Catalin Marinas <catalin.marinas@arm.com> wrote:
> ARCH_DMA_MINALIGN represents the minimum (static) alignment for safe DMA
> operations while ARCH_KMALLOC_MINALIGN is the minimum kmalloc() objects
> alignment.
>
> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Jonathan Cameron <jic23@kernel.org>
> Cc: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Thanks.
Jonathan
> ---
> include/linux/iio/iio.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
> index 81413cd3a3e7..d28a5e8097e4 100644
> --- a/include/linux/iio/iio.h
> +++ b/include/linux/iio/iio.h
> @@ -722,7 +722,7 @@ static inline void *iio_device_get_drvdata(const struct iio_dev *indio_dev)
> * must not share cachelines with the rest of the structure, thus making
> * them safe for use with non-coherent DMA.
> */
> -#define IIO_DMA_MINALIGN ARCH_KMALLOC_MINALIGN
> +#define IIO_DMA_MINALIGN ARCH_DMA_MINALIGN
> struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv);
>
> /* The information at the returned address is guaranteed to be cacheline aligned */
>
>
next prev parent reply other threads:[~2023-06-02 11:19 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-31 15:48 [PATCH v6 00/17] mm, dma, arm64: Reduce ARCH_KMALLOC_MINALIGN to 8 Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 01/17] mm/slab: Decouple ARCH_KMALLOC_MINALIGN from ARCH_DMA_MINALIGN Catalin Marinas
2023-06-09 12:32 ` Vlastimil Babka
2023-06-09 13:44 ` Catalin Marinas
2023-06-09 13:57 ` Catalin Marinas
2023-06-09 14:13 ` Vlastimil Babka
2023-05-31 15:48 ` [PATCH v6 02/17] dma: Allow dma_get_cache_alignment() to be overridden by the arch code Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 03/17] mm/slab: Simplify create_kmalloc_cache() args and make it static Catalin Marinas
2023-06-09 13:03 ` Vlastimil Babka
2023-05-31 15:48 ` [PATCH v6 04/17] mm/slab: Limit kmalloc() minimum alignment to dma_get_cache_alignment() Catalin Marinas
2023-06-09 14:33 ` Vlastimil Babka
2023-05-31 15:48 ` [PATCH v6 05/17] drivers/base: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 06/17] drivers/gpu: " Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 07/17] drivers/usb: " Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 08/17] drivers/spi: " Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 09/17] dm-crypt: " Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 10/17] iio: core: " Catalin Marinas
2023-06-02 11:19 ` Jonathan Cameron [this message]
2023-05-31 15:48 ` [PATCH v6 11/17] arm64: Allow kmalloc() caches aligned to the smaller cache_line_size() Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 12/17] scatterlist: Add dedicated config for DMA flags Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 13/17] dma-mapping: Name SG DMA flag helpers consistently Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 14/17] dma-mapping: Force bouncing if the kmalloc() size is not cache-line-aligned Catalin Marinas
2023-05-31 15:48 ` [PATCH v6 15/17] iommu/dma: Force bouncing if the size is not cacheline-aligned Catalin Marinas
2023-06-09 11:52 ` Robin Murphy
2023-05-31 15:48 ` [PATCH v6 16/17] mm: slab: Reduce the kmalloc() minimum alignment if DMA bouncing possible Catalin Marinas
2023-06-09 14:39 ` Vlastimil Babka
2023-05-31 15:48 ` [PATCH v6 17/17] arm64: Enable ARCH_WANT_KMALLOC_DMA_BOUNCE for arm64 Catalin Marinas
2023-06-08 5:45 ` [PATCH v6 00/17] mm, dma, arm64: Reduce ARCH_KMALLOC_MINALIGN to 8 Isaac Manjarres
2023-06-08 8:05 ` Ard Biesheuvel
2023-06-08 21:29 ` Isaac Manjarres
2023-06-09 8:11 ` Petr Tesařík
2023-06-12 7:44 ` Tomonori Fujita
2023-06-12 7:47 ` Christoph Hellwig
2023-06-14 23:55 ` Isaac Manjarres
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