288e351b55
ithread_remove_handler() may fail to remove the interrupt handler if it decides to let the ithread do the removal. The problem is that during boot "cold" is set, which causes msleep() to return immediately. This will cause ithread_remove_handler() to fail to wait for the ithread to do the removal from the handler TAILQ before freeing the handler back to the heap. Bad things will happen when some other user of the TAILQ, such as ithread_add_handler() or the actual ithread attempts to use the freed handler. Fix the problem by forcing ithread_remove_handler() to do the actual removal itself if the "cold" flag is set. Reviewed by: jhb
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