From: masi19bw <masi19bw@gmail.com>
Date: Tue, 22 Jun 2021 09:07:49 +0000 (+0000)
Subject: Add docs about BPF_HASH_OF_MAPS
X-Git-Tag: v0.21.0~25
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a17fbc5f95a393a406286316d9dcf2fc2061eb1d;p=platform%2Fupstream%2Fbcc.git

Add docs about BPF_HASH_OF_MAPS
---

diff --git a/docs/reference_guide.md b/docs/reference_guide.md
index 0c7ccfeb..f280be53 100644
--- a/docs/reference_guide.md
+++ b/docs/reference_guide.md
@@ -1165,7 +1165,7 @@ BPF_ARRAY_OF_MAPS(maps_array, "ex1", 10);
 
 ### 15. BPF_HASH_OF_MAPS
 
-Syntax: ```BPF_HASH_OF_MAPS(name, inner_map_name, size)```
+Syntax: ```BPF_HASH_OF_MAPS(name, key_type, inner_map_name, size)```
 
 This creates a hash map with a map-in-map type (BPF_MAP_TYPE_HASH_OF_MAPS) map named ```name``` with ```size``` entries. The inner map meta data is provided by map ```inner_map_name``` and can be most of array or hash maps except ```BPF_MAP_TYPE_PROG_ARRAY```, ```BPF_MAP_TYPE_CGROUP_STORAGE``` and ```BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE```.
 
@@ -1173,7 +1173,7 @@ For example:
 ```C
 BPF_ARRAY(ex1, int, 1024);
 BPF_ARRAY(ex2, int, 1024);
-BPF_HASH_OF_MAPS(maps_hash, "ex1", 10);
+BPF_HASH_OF_MAPS(maps_hash, struct custom_key, "ex1", 10);
 ```
 
 ### 16. BPF_STACK