Re: [PATCH 1/4] v4l2: add vb2_get_unmapped_area in vb2 core

[Scott Jiang]

>
> Hm, wouldn't it be better to use vb2_mmap() and provide a dummy .mmap()
> method in videobuf2-dma-contig.c for the NOMMU case?
>
these are two different file operations called by mm system.
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