| Date | Tue, 6 Oct 2015 22:07:25 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH tip/core/rcu 07/13] rcu: Move preemption disabling out of __srcu_read_lock() |
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On Tue, Oct 06, 2015 at 09:13:42AM -0700, Paul E. McKenney wrote: > Currently, __srcu_read_lock() cannot be invoked from restricted > environments because it contains calls to preempt_disable() and > preempt_enable(), both of which can invoke lockdep, which is a bad > idea in some restricted execution modes. This commit therefore moves > the preempt_disable() and preempt_enable() from __srcu_read_lock() > to srcu_read_lock(). It also inserts the preempt_disable() and > preempt_enable() around the call to __srcu_read_lock() in do_exit().
Did you not simply want to use: preempt_disable_notrace() ?
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