dma-buf: heaps: Give default CMA heap a fixed name

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The CMA heap's name in devtmpfs can vary depending on how the heap is
defined. Its name defaults to "reserved", but if a CMA area is defined
in the devicetree, the heap takes on the devicetree node's name, such as
"default-pool" or "linux,cma". To simplify naming, unconditionally name
it "default_cma_region", but keep a legacy node in place backed by the
same underlying allocator for backwards compatibility.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Jared Kangas <jkangas@redhat.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://lore.kernel.org/r/20250610131231.1724627-4-jkangas@redhat.com

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Jared Kangas 2025-06-10 06:12:31 -07:00 • committed by Sumit Semwal

parent 86e59cc506

commit 854acbe75f

3 changed files with 34 additions and 3 deletions

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7

Documentation/userspace-api/dma-buf-heaps.rst

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10

drivers/dma-buf/heaps/Kconfig

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20

drivers/dma-buf/heaps/cma_heap.c

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