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    Subject[PATCH] obscure pid implementation fix (v2)
    I remade the previous patch against the latest Linus tree, please apply.

    This patch fixes strange and obscure pid implementation in current kernels:
    - it removes calling of put_task_struct() from detach_pid()
    under tasklist_lock. This allows to use blocking calls
    in security_task_free() hooks (in __put_task_struct()).
    - it saves some space = 5*5 ints = 100 bytes in task_struct
    - it's smaller and tidy, more straigthforward and doesn't use
    any knowledge about pids using and assignment.
    - it removes pid_links and pid_struct doesn't hold reference counters
    on task_struct. instead, new pid_structs and linked altogether and
    only one of them is inserted in hash_list.

    Signed-off-by: Kirill Korotaev (


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