Re: [PATCH v4 1/4] dma-buf: Require VM_PFNMAP vma for mmap

Hi Am 13.07.21 um 22:51 schrieb Daniel Vetter: tldr; DMA buffers aren't normal memory, expecting that you can use them like that (like calling get_user_pages works, or that they're accounting like any other normal memory) cannot be guaranteed. Since some userspace only runs on integrated device

[PATCH v4 1/4] dma-buf: Require VM_PFNMAP vma for mmap

tldr; DMA buffers aren't normal memory, expecting that you can use them like that (like calling get_user_pages works, or that they're accounting like any other normal memory) cannot be guaranteed. Since some userspace only runs on integrated devices, where all buffers are actually all resident sys