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    Subjectswapper_space export
    I was trying to compile the Unionfs[1] to get it up to sync it up with
    the kernel developments from the past few months. Anyway, long story
    short...swapper_space (defined in mm/swap_state.c) is not exported
    anymore (git commit: 4936967374c1ad0eb3b734f24875e2484c3786cc). This
    apparently is not an issue for most modules. Troubles arise when the
    modules include mm.h or any of its relatives.

    One simply gets a linker error about swapper_space not being defined.
    The problem is that it is used in mm.h.

    I included a reverse patch to export the symbol again.

    Josef "Jeff" Sipek.


    Export swapper_space because several include files reference it.

    Signed-off-by: Josef Sipek <>

    --- a/mm/swap_state.c.orig 2006-05-16 18:23:38.000000000 -0400
    +++ b/mm/swap_state.c 2006-05-16 18:22:57.000000000 -0400
    @@ -43,6 +43,7 @@
    .i_mmap_nonlinear = LIST_HEAD_INIT(swapper_space.i_mmap_nonlinear),
    .backing_dev_info = &swap_backing_dev_info,

    #define INC_CACHE_INFO(x) do { swap_cache_info.x++; } while (0)

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