Re: [PATCH tip/core/rcu 07/13] rcu: Move preemption disabling out of __srcu_read_lock()

[Peter Zijlstra]

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() ?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/