• Christoph Hellwig's avatar
    dma-mapping: zero memory returned from dma_alloc_* · 518a2f19
    Christoph Hellwig authored
    If we want to map memory from the DMA allocator to userspace it must be
    zeroed at allocation time to prevent stale data leaks.   We already do
    this on most common architectures, but some architectures don't do this
    yet, fix them up, either by passing GFP_ZERO when we use the normal page
    allocator or doing a manual memset otherwise.
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
    Acked-by: Sam Ravnborg <sam@ravnborg.org> [sparc]
    518a2f19
virt.c 1.42 KB