arno/linux-insides
1
0
Fork 0
mirror of https://github.com/0xAX/linux-insides.git synced 2024-12-22 22:58:08 +00:00
Code Issues Releases Wiki Activity

Merge pull request #426 from rawcoder/patch-1

Browse Source 
Added missing ``` in sync-5.md
This commit is contained in:
0xAX 2016-09-06 14:38:07 +03:00 committed by GitHub
commit 2064bbda38
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
SyncPrim/sync-5.md
View File

@ -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: