Hi, That's v7 of the series reducing the kmalloc() minimum alignment on arm64 to 8 (from 128). There's no new/different functionality, mostly cosmetic changes and acks/tested-bys. Andrew, if there are no further comments or objections to this version, are you ok to take the series through the mm tree? The arm64 changes are fairly small. Alternatively, I can push it into linux-next now to give it some wider exposure and decide whether to upstream it when the merging window opens. Thanks. The updated patches are also available on this branch: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux devel/kmalloc-minalign Changes since v6 (https://lore.kernel.org/r/20230531154836.1366225-1-catalin.marinas@xxxxxxx): - Moved ARCH_DMA_MINALIGN to include/linux/cache.h from slab.h (it matches the asm/cache.h where most architectures defining this macro place it). - Single body for __kmalloc_minalign() with an #ifdef. - Renamed the sg_dma_use_swiotlb() to sg_dma_is_swiotlb() (Robin's suggestion). - Added acks/tested-by. Catalin Marinas (15): mm/slab: Decouple ARCH_KMALLOC_MINALIGN from ARCH_DMA_MINALIGN dma: Allow dma_get_cache_alignment() to be overridden by the arch code mm/slab: Simplify create_kmalloc_cache() args and make it static mm/slab: Limit kmalloc() minimum alignment to dma_get_cache_alignment() drivers/base: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN drivers/gpu: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN drivers/usb: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN drivers/spi: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN dm-crypt: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN iio: core: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN arm64: Allow kmalloc() caches aligned to the smaller cache_line_size() dma-mapping: Force bouncing if the kmalloc() size is not cache-line-aligned iommu/dma: Force bouncing if the size is not cacheline-aligned mm: slab: Reduce the kmalloc() minimum alignment if DMA bouncing possible arm64: Enable ARCH_WANT_KMALLOC_DMA_BOUNCE for arm64 Robin Murphy (2): scatterlist: Add dedicated config for DMA flags dma-mapping: Name SG DMA flag helpers consistently arch/arm64/Kconfig | 1 + arch/arm64/include/asm/cache.h | 3 ++ arch/arm64/mm/init.c | 7 +++- drivers/base/devres.c | 6 ++-- drivers/gpu/drm/drm_managed.c | 6 ++-- drivers/iommu/Kconfig | 1 + drivers/iommu/dma-iommu.c | 58 ++++++++++++++++++++++++-------- drivers/iommu/iommu.c | 2 +- drivers/md/dm-crypt.c | 2 +- drivers/pci/Kconfig | 1 + drivers/spi/spidev.c | 2 +- drivers/usb/core/buffer.c | 8 ++--- include/linux/cache.h | 6 ++++ include/linux/dma-map-ops.h | 61 ++++++++++++++++++++++++++++++++++ include/linux/dma-mapping.h | 5 ++- include/linux/iio/iio.h | 2 +- include/linux/scatterlist.h | 60 ++++++++++++++++++++++++++------- include/linux/slab.h | 14 +++++--- kernel/dma/Kconfig | 7 ++++ kernel/dma/direct.c | 2 +- kernel/dma/direct.h | 3 +- mm/slab.c | 6 +--- mm/slab.h | 5 ++- mm/slab_common.c | 41 +++++++++++++++++------ 24 files changed, 244 insertions(+), 65 deletions(-)
