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    Subject[PATCH] sysfs: fix hardlink count on device_move
    From: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>

    Update directory hardlink count when moving kobjects to a new parent.
    Fixes the following problem which occurs when several devices are
    moved to the same parent and then unregistered:

    > ls -laF /sys/devices/css0/defunct/
    > total 0
    > drwxr-xr-x 4294967295 root root 0 2009-07-14 17:02 ./
    > drwxr-xr-x 114 root root 0 2009-07-14 17:02 ../
    > drwxr-xr-x 2 root root 0 2009-07-14 17:01 power/
    > -rw-r--r-- 1 root root 4096 2009-07-14 17:01 uevent

    Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
    ---
    fs/sysfs/dir.c | 2 ++
    1 file changed, 2 insertions(+)

    Index: linux-2.6.31-rc3/fs/sysfs/dir.c
    ===================================================================
    --- linux-2.6.31-rc3.orig/fs/sysfs/dir.c
    +++ linux-2.6.31-rc3/fs/sysfs/dir.c
    @@ -939,8 +939,10 @@ again:
    /* Remove from old parent's list and insert into new parent's list. */
    sysfs_unlink_sibling(sd);
    sysfs_get(new_parent_sd);
    + drop_nlink(old_parent->d_inode);
    sysfs_put(sd->s_parent);
    sd->s_parent = new_parent_sd;
    + inc_nlink(new_parent->d_inode);
    sysfs_link_sibling(sd);

    out_unlock:


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