Linked by Thom Holwerda on Sun 22nd Jul 2007 00:33 UTC, submitted by liquidat
Linux Linus Torvalds included patches into the mainline tree which implement a stable userspace driver API into the Linux kernel. The stable driver API was already announced a year ago by Greg Kroah-Hartman. Now the last patches were uploaded and the API was included in Linus' tree. The idea of the API is to make life easier for driver developers: "This interface allows the ability to write the majority of a driver in userspace with only a very small shell of a driver in the kernel itself. It uses a char device and sysfs to interact with a userspace process to process interrupts and control memory accesses."
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RE[3]: I wonder...
by PlatformAgnostic on Sun 22nd Jul 2007 08:59 UTC in reply to "RE[2]: I wonder..."
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Evolution tends to conserve more than it changes. You can only have life when you have a core set of things that function to maintain homeostasis. Without this, you just have unconstrained chemical reactions which just dissipate energy and create no further development.

We may argue that different levels of homeostasis and transistasis are necessary for different classes of organisms, but most natural organisms evolve by duplicating genes and then mutating one of the replicas so that the old functionality continues working while the other replica either slowly mutates into oblivion or becomes something entirely different.

There's nothing wrong with a stable ABI with clear transitions so that one can be deprecated over several releases while the new one is brought online. The testing and maintanance effort is slightly greater, but with 100s of people involved in the Linux Kernel's development, there really should be no excuse to maintain a pair of ABI revs for major interfaces.

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