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The Linux kernel configuration item CONFIG_DMA_SHARED_BUFFER
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This option enables the framework for buffer-sharing between multiple drivers. A buffer is associated with a file using driver APIs extension; the file's descriptor can then be passed on to other driver.
Raw data from LKDDb:
lkddb fs "dmabuf" : CONFIG_DMA_SHARED_BUFFER : drivers/dma-buf/dma-buf.c # in 5.3–5.19, 6.0–6.11, 6.12-rc+HEAD
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Automatically generated (in year 2024). See also LKDDb sources on GitLab