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From r355819: Repeat the spinlock_enter/exit pattern from amd64 on other architectures to 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. This is completely untested - I have no obsolete Sparc hardware - but someone did try testing recent changes on sparc64 (PR 243534). PR: 243534 |
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