• Russell King's avatar
    ARM: add dma coherent region reporting via procfs · 45cd5290
    Russell King authored
    
    
    Add a new seqfile for reporting coherent DMA allocations.  This contains
    the address range, size and the function which was used to allocate
    each region, allowing these allocations to be viewed in much the same
    way as /proc/vmallocinfo.
    
    The DMA coherent region has limited space, so this allows allocation
    failures to be viewed, as well as finding out how much space is being
    used.
    
    Make sure this file is only readable by root - same as vmallocinfo - to
    prevent information leakage.
    Acked-by: default avatarNicolas Pitre <nico@linaro.org>
    Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
    45cd5290