Justin Husted ff4d082246 Change preempt_disable() etc. to use a recursive mutex.
This is part of the userspace implementation of the kernel APIs for
bcachefs-tools. The previous implementation just provided a barrier, but
this isn't sufficient to make the associated percpu implementation safe.

Signed-off-by: Justin Husted <sigstop@gmail.com>
2019-11-03 23:17:43 -05:00
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