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    SubjectRe: [PATCH 04/11] ipc: move locking out of ipcctl_pre_down_nolock
    Date
    Davidlohr Bueso <davidlohr.bueso@hp.com> writes:

    > This function currently acquires both the rw_mutex and the rcu lock on
    > successful lookups, leaving the callers to explicitly unlock them, creating
    > another two level locking situation.

    Note that the rcu read lock is not a real lock, so it doesn't have the
    usual ordering problems.

    -Andi

    --
    ak@linux.intel.com -- Speaking for myself only


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