anand76 ec9f52ece6 Fix a race in LRUCacheShard::Promote (#8717)
Summary:
In ```LRUCacheShard::Promote```, a reference is released outside the LRU mutex. Fix the race condition.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8717

Reviewed By: zhichao-cao

Differential Revision: D30649206

Pulled By: anand1976

fbshipit-source-id: 09c0af05b2294a7fe2c02876a61b0bad6e3ada61
2021-08-30 19:10:55 -07:00
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2017-07-15 16:11:23 -07:00