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We already familiar with the [semaphore](https://en.wikipedia.org/wiki/Semaphore_%28programming%29) synchronization primitive from the previous [part]((https://0xax.gitbooks.io/linux-insides/content/SyncPrim/sync-4.html). It represented by the:
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We already familiar with the [semaphore](https://en.wikipedia.org/wiki/Semaphore_%28programming%29) synchronization primitive from the previous [part]((https://0xax.gitbooks.io/linux-insides/content/SyncPrim/sync-4.html). It represented by the:
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