From 63d0455c7e151eded7b1fe05eceb87aca23127a3 Mon Sep 17 00:00:00 2001
From: 0xAX <0xAX@users.noreply.github.com>
Date: Sun, 24 Apr 2016 20:11:58 +0600
Subject: [PATCH] Update README.md

---
 SyncPrim/README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/SyncPrim/README.md b/SyncPrim/README.md
index 8734886..b57fe8b 100644
--- a/SyncPrim/README.md
+++ b/SyncPrim/README.md
@@ -4,3 +4,4 @@ This chapter describes synchronization primitivies in the Linux kernel.
 
 * [Introduction to spinlocks](http://0xax.gitbooks.io/linux-insides/content/SyncPrim/sync-1.html) - the first part of this chapter describes implementation of spinlock mechanism in the Linux kernel.
 * [Queued spinlocks](https://0xax.gitbooks.io/linux-insides/content/SyncPrim/sync-2.html) - the second part describes another type of spinlocks - queued spinlocks.
+* [Semaphores](https://0xax.gitbooks.io/linux-insides/content/SyncPrim/sync-3.html) - this part describes implementation of `semaphore` synchronization primitive in the Linux kernel.