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In C, bitfields are not necessarily safe to modify from multiple threads without locking. Switch "dma_coherent" over to the "flags" field so modifications are safe. Cc: Christoph Hellwig <hch@lst.de> Reviewed-by: Rafael J. Wysocki (Intel) <rafael@kernel.org> Reviewed-by: Danilo Krummrich <dakr@kernel.org> Acked-by: Vinod Koul <vkoul@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://patch.msgid.link/20260406162231.v5.7.If839f6dde98979fce177f70c6c74689a1904ee76@changeid [ Since all DEV_FLAG_DMA_COHERENT accessors are exposed unconditionally, also drop the CONFIG guards around dev_assign_dma_coherent() in device_initialize() to ensure a correct default value. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org>