• Taehee Yoo's avatar
    umh: add exit routine for UMH process · 73ab1cb2
    Taehee Yoo authored
    A UMH process which is created by the fork_usermode_blob() such as
    bpfilter needs to release members of the umh_info when process is
    terminated.
    But the do_exit() does not release members of the umh_info. hence module
    which uses UMH needs own code to detect whether UMH process is
    terminated or not.
    But this implementation needs extra code for checking the status of
    UMH process. it eventually makes the code more complex.
    
    The new PF_UMH flag is added and it is used to identify UMH processes.
    The exit_umh() does not release members of the umh_info.
    Hence umh_info->cleanup callback should release both members of the
    umh_info and the private data.
    Suggested-by: 's avatarDavid S. Miller <davem@davemloft.net>
    Signed-off-by: 's avatarTaehee Yoo <ap420073@gmail.com>
    Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
    73ab1cb2