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AndroidKernelMSM

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    Jordan Crouse authored and Iliyan Malchev committed
    VM_IO prevents mapped memory from being peeked by ptrace(). That
    kind of protection isn't really needed for nominal GPU buffers.
    A process given itself up to ptrace() already expects to be
    examined so there is no additional risk to let the parent examine
    GPU buffers too.  This is done universally now, but there is no
    reason why we wouldn't let the process choose which buffers to
    keep private in the future.
    
    That said; there is more of a concern about including GPU buffers
    in a core dump since that is a more permanent and less secure
    record of the memory so add VM_DONTDUMP for all GPU buffers to
    protect against that.
    
    CRs-Fixed: 654751
    Change-Id: Ic0dedbade91a2ec458bcb27eff3312d4ec6e4389
    Signed-off-by: default avatarJordan Crouse <jcrouse@codeaurora.org>
    c240a9bc
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