a94ba188c3
fix an assert violation introduced in r355784. Without this spinlock_exit() may see owepreempt and switch before reducing the spinlock count. amd64 had been optimized to do a single critical enter/exit regardless of the number of spinlocks which avoided the problem and this optimization had not been applied elsewhere. Reported by: emaste Suggested by: rlibby Discussed with: jhb, rlibby Tested by: manu (arm64)
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