dma-buf: Drop dma_buf_k(un)map

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It's unused.

10 years ago, back when 32bit was still fairly common and trying to
not exhaust vmalloc space sounded like a worthwhile goal, adding these
to dma_buf made sense.

Reality is that they simply never caught on, and nowadays everyone who
needs plenty of buffers will run in 64bit mode anyway.

Also update the docs in this area to adjust them to reality.

The actual hooks in dma_buf_ops will be removed once all the
implementations are gone.

Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Link: https://patchwork.freedesktop.org/patch/msgid/20191118103536.17675-10-daniel.vetter@ffwll.ch

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This commit is contained in:

Daniel Vetter 2019-11-18 11:35:30 +01:00

parent 7195cf427b

commit 7f0de8d808

2 changed files with 3 additions and 62 deletions

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63

drivers/dma-buf/dma-buf.c

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2

include/linux/dma-buf.h

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