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dma-buf: heaps: cma: Turn the heap into a module

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All the symbols used by the CMA heap are already exported, so turning it
into a module is straightforward. We only need to add the usual MODULE_*
macros, import the proper namespaces and change the Kconfig symbol to a
tristate.

This heap won't be able to unload though, since we're missing a lot of
infrastructure to make it safe.

Reviewed-by: T.J. Mercier <tjmercier@google.com>
Acked-by: Andrew Davis <afd@ti.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://patch.msgid.link/20260427-dma-buf-heaps-as-modules-v5-2-b6f5678feefc@kernel.org
This commit is contained in:
Maxime Ripard 2026-04-27 12:04:58 +02:00 committed by Sumit Semwal
parent f78a0607c8
commit 10bb37fc62
2 changed files with 4 additions and 1 deletions
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2
drivers/dma-buf/heaps/Kconfig
View File

@ -6,7 +6,7 @@ config DMABUF_HEAPS_SYSTEM
is backed by pages from the buddy allocator. If in doubt, say Y.
config DMABUF_HEAPS_CMA
bool "DMA-BUF CMA Heap"
tristate "DMA-BUF CMA Heap"
depends on DMABUF_HEAPS && DMA_CMA
help
Choose this option to enable dma-buf CMA heap. This heap is backed

3
drivers/dma-buf/heaps/cma_heap.c
View File

@ -420,3 +420,6 @@ static int __init add_cma_heaps(void)
}
module_init(add_cma_heaps);
MODULE_DESCRIPTION("DMA-BUF CMA Heap");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("DMA_BUF");
MODULE_IMPORT_NS("DMA_BUF_HEAP");