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a2ded8cab4
add dma_heap_find/dma_heap_buffer_alloc
for kernel-space user
1. struct dma_heap *heap = dma_heap_find("system");
2. struct dma_buf *dmabuf = dma_heap_buffer_alloc(heap, ....);
3. dma_buf_attach/dma_buf_map_attachment
4. dma_buf_unmap_attachment/dma_buf_detach
5. dma_buf_put
Change-Id: I6d3e347698785c2b751bcef980607ed308270c76
Signed-off-by: Simon Xue <xxm@rock-chips.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.