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    Subject[PATCH 0/4] arm64: Default to 32-bit wide ZONE_DMA
    Date
    Using two distinct DMA zones turned out to be problematic. Here's an
    attempt go back to a saner default.

    I tested this on both a RPi4 and QEMU.

    ---

    Nicolas Saenz Julienne (4):
    of/fdt: Update zone_dma_bits when running in bcm2711
    dma-direct: Turn zone_dma_bits default value into a define
    arm64: Default to 32-bit ZONE_DMA
    mm: Update DMA zones description with arm64 newer behavior

    arch/arm64/mm/init.c | 12 ++++++++----
    drivers/of/fdt.c | 10 ++++++++++
    include/linux/dma-direct.h | 1 +
    include/linux/mmzone.h | 5 +++--
    kernel/dma/direct.c | 2 +-
    5 files changed, 23 insertions(+), 7 deletions(-)

    --
    2.28.0

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