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author | Christoph Hellwig <hch@lst.de> | 2018-09-11 08:55:28 +0200 |
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committer | Christoph Hellwig <hch@lst.de> | 2018-09-20 09:01:16 +0200 |
commit | 58b0440663ec11372befb8ead0ee7099d8878590 (patch) | |
tree | c613ed22ad229e6612d8c71888d2bb8139163ea8 /lib/clz_tab.c | |
parent | bc3ec75de5452db59b683487867ba562b950708a (diff) | |
download | linux-58b0440663ec11372befb8ead0ee7099d8878590.tar.gz |
dma-mapping: consolidate the dma mmap implementations
The only functional differences (modulo a few missing fixes in the arch code) is that architectures without coherent caches need a hook to convert a virtual or dma address into a pfn, given that we don't have the kernel linear mapping available for the otherwise easy virt_to_page call. As a side effect we can support mmap of the per-device coherent area even on architectures not providing the callback, and we make previous dangerous default methods dma_common_mmap actually save for non-coherent architectures by rejecting it without the right helper. In addition to that we need a hook so that some architectures can override the protection bits when mmaping a dma coherent allocations. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Paul Burton <paul.burton@mips.com> # MIPS parts
Diffstat (limited to 'lib/clz_tab.c')
0 files changed, 0 insertions, 0 deletions