this post was submitted on 08 Mar 2024
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Linux
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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What difference does that make? I had thought the android kernel was just the Linux kernel
It basically is, but this kernel is much modified by modem maker, SoC maker and device and component manufacturers. They almost always do dirty low quality patches just to make one device work with Android and not care about sending them to upstream (mainline) kernel or even about compatibility with anything but their Android version.
https://not.mainline.space/ - example of OnePlus 6 having more than 5,600,000 lines of code difference from normal Linux kernel. And is still considered pretty close compared to most phones.
That not gpl violation? Not publishing kernel patch?
They are publishing their version of the kernel. The problem is that this kernel is so much modified and dirtly patched it is useless to run anything other than Android.
And many device drivers for Android are now proprietary blobs in Android userspace outside of the kernel code.
I think that in the Android kernel (for your device) there are binary blobs for hardware drivers. Which are not in mainline and most of the times not even available anywhere.
Driver blobs often have ludicrous requirements/restrictions and are made for Android. Main difference would be the kernel version i guess.