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Merge pull request #426 from rawcoder/patch-1

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Added missing ``` in sync-5.md
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0xAX 2016-09-06 14:38:07 +03:00 committed by GitHub
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SyncPrim/sync-5.md
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@ -209,6 +209,7 @@ As you already may guess, the `LOCK_CONTENDED` macro does all job for us. Let's
```C
#define LOCK_CONTENDED(_lock, try, lock) \
lock(_lock)
```
As we may see it just calls the `lock` function which is third parameter of the `LOCK_CONTENDED` macro with the given `rw_semaphore`. In our case the third parameter of the `LOCK_CONTENDED` macro is the `__down_write` function which is architecture specific function and located in the [arch/x86/include/asm/rwsem.h](https://github.com/torvalds/linux/blob/master/arch/x86/include/asm/rwsem.h) header file. Let's look at the implementation of the `__down_write` function: