Linus Torvalds has publicly posted his thoughts to the Linux Kernel Mailing List (LKML) about the update to the GPL license, under which the Linux kernel itself is licensed.
His opposition to the new license may prove to be the death knell for widespread acceptance of the GPL 3, as the Linux kernel is arguably among the most well known and widely used GPL-licensed applications in existence.
Version 2 of the GPL doesn't specifically require that a licensed application automatically update itself when a new version becomes available. Torvalds took aim at a commonly held notion that GPL version 2 can at the licensee's option also be licensed under "any later version" of the license.
"It's part of the explanatory text that talks about how to apply the license to your program, and it says that if you want to accept any later versions of the GPL, you can state so in your source code. The Linux kernel has never stated that in general.
"If you want to license a program under any later version of the GPL, you have to state so explicitly. Linux never did."
GPL version 3 includes numerous new provisions, including those that improve license compatibility and those that protect against patent and digital rights management technologies.
In particular Torvalds does not agree with at least one proposed provision of the new license. Section 6 of the proposed GPL version 3 is titled, "Non-Source Distribution."