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由 David S. Miller 提交于
As noticed by Linus, it is critical that some of the rwsem constants be signed. Yet, hex constants are unsigned unless explicitly casted or negated. The most critical one is RWSEM_WAITING_BIAS. This bug was exacerbated by commit 424acaae ("rwsem: wake queued readers when writer blocks on active read lock") Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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