update LICENSE

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 smallkirby
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -136,7 +136,14 @@ If you have any suggestions, feel free to contact me on [Twitter](https://twitte
 
 
 
-#### DISCLAIMER
-You can cite or use my code and comments in this repo as you like basically.  
-The exceptions are when the code belongs to some other licenses. In that case, follow them. Also, you can't use them for evil purpose. Finally, I don't take any responsibility for using my code or comment.  
-If you find something useful, or you notice that hoge is wrong, I'll appreciate if you leave comments via PR, Issue, DM, or Blog.
+## LICENSE
+
+This repository is licensed under [MIT](./LICENSE).
+
+Note that this license is applied only to WHAT I WROTE.
+
+Binary of kernel challenges themselves would be in many cases licensed under other licenses.
+
+Please follow these in that case.
+
+If you think this or related repositories violate your rights, please contact me.