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    fix loop checks in d_materialise_unique() · 18367501
    Al Viro 提交于
    Both __d_unalias() and __d_materialise_dentry() need loop prevention.
    Grab rename_lock in caller, check for loops there...
    
    As a side benefit, we have dentry_lock_for_move() called only under
    rename_lock, which seriously reduces deadlock potential of the
    execrable "locking order" used for ->d_lock.
    Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
    18367501
dcache.c 78.0 KB