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    SubjectRe: [PATCH 5/8] rcu: eliminate deadlock for rcu read site
    On Sat, Aug 10, 2013 at 11:43:59AM +0800, Lai Jiangshan wrote:
    > Hi, Steven
    > I was considering rtmutex's lock->wait_lock is a scheduler lock,
    > But it is not, and it is just a spinlock of process context.
    > I hope you change it to a spinlock of irq context.

    rwmutex::wait_lock is irq-safe; it had better be because its taken under

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