blogng/blog/2017-08-02-linux-4.12.markdown

---
comments: true
date: 2017-08-02
layout: post
tags: linux, kernel, systems, code
title: 'Linux-4.12 '
---

Linux 4.12 was released few weeks ago. Its always nice to get a new version of kernel, but this time it was extra sweet, I managed to get some tiny commits merged to the release.

This was because of the [Eudyptula Challenge](http://eudyptula-challenge.org/), a program a quite kernel person has been running that helps people get started with Linux kernel development. I'm now at the 18 of 20 programming tasks. Every challenge is mailed to you (In plain email) after you finish the last one, and each step is a learning experience. You quickly realize that you can't solve things by plain google-stackoverflow duos, and eventually you discover the magical `Documentation` folder in linux tree.

Three out of my four commits have been style fixes, and the last one was a locking discrepancy in one of the staging drivers. [The links are here.](https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git/log/?qt=author&q=dhananjay+balan)

There is a certain feel of happiness when I get to understand when things are implemented in kernel. I'm really looking forward to poking the code and do more than trivial commits.
Linux 4.12 commits. 2017-08-02 10:46:29 +00:00			`---`
			`comments: true`
Convert from old categories to tags import sys import yaml with open(sys.argv[1]) as fp: data = fp.read() if not data.find("---") == 0: # no head print("NO YAML HEAD FOUND") sys.exit(-1) data = data[3:] head_end = data.find("---") head = data[0:head_end] data = data[head_end+3:] metadata = yaml.safe_load(head) cats = metadata.pop('categories', None) if cats != None: if type(cats) == list: tags = cats elif type(cats) == str: tags = cats.split() tags = list(map(lambda t: t.lower(), tags)) metadata["tags"] = ", ".join(tags) new_data = f"---\n{yaml.dump(metadata, default_flow_style=False)}---{data}" # write it print(f"coverted: categories to tags: {tags} - {sys.argv[1]}") with open(sys.argv[1], "w") as fp: fp.write(new_data) sys.exit(0) if not metadata.get("tags", None): metadata["tags"] = "untagged" new_data = f"---\n{yaml.dump(metadata, default_flow_style=False)}---{data}" print(f"untagged: {sys.argv[1]}") # write it with open(sys.argv[1], "w") as fp: fp.write(new_data) sys.exit(0) print("No changes needed") 2019-01-28 22:16:27 +00:00			`date: 2017-08-02`
			`layout: post`
			`tags: linux, kernel, systems, code`
			`title: 'Linux-4.12 '`
Linux 4.12 commits. 2017-08-02 10:46:29 +00:00			`---`

			`Linux 4.12 was released few weeks ago. Its always nice to get a new version of kernel, but this time it was extra sweet, I managed to get some tiny commits merged to the release.`

			This was because of the [Eudyptula Challenge](http://eudyptula-challenge.org/), a program a quite kernel person has been running that helps people get started with Linux kernel development. I'm now at the 18 of 20 programming tasks. Every challenge is mailed to you (In plain email) after you finish the last one, and each step is a learning experience. You quickly realize that you can't solve things by plain google-stackoverflow duos, and eventually you discover the magical `Documentation` folder in linux tree.

			`Three out of my four commits have been style fixes, and the last one was a locking discrepancy in one of the staging drivers. [The links are here.](https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git/log/?qt=author&q=dhananjay+balan)`

			`There is a certain feel of happiness when I get to understand when things are implemented in kernel. I'm really looking forward to poking the code and do more than trivial commits.`