mutex_unlock() in interrupt context

[Jerry Cooperstein]

kernel/mutex.c says about mutex_unlock():

 * This function must not be used in interrupt context.

However I have done some simple test cases that show
it works without complaint.  Now I understand that one
shouldn't do this for good reasons.  So is this a
good coding practice rule, but something that
could appear in sloppy or poorly designed code?

Jerry Cooperstein
 Axian, Inc., Software Consulting and Training

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