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than trying to optimize it into a single lock. This adds more calls to lock giant with non smpsafe filesystems but is the only way to reliably hold the correct lock. - Remove an invalid assert in the mountedhere case in lookup and fix the code to properly deal with the scenario. We can actually have a lookup that returns dp == dvp with mountedhere set with certain unmount races. Tested by: kris Reported by: kris/mohans
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