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[2]: I wonder...
by abraxas on Mon 23rd Jul 2007 01:17 UTC in reply to "RE: I wonder..."
abraxas
Member since:
2005-07-07

When things like the USB stack have been rewritten 3 times, people here point to 'ooh, they're optimising' when in reality it has to do with a lack of planning - Linux kernel developers seem to ignore the cardinal rule that all programmers are taught regarding system design and analysis

You would like to believe that is the case but it isn't. The USB drivers are a lot better than the drivers available for Windows or OSX. The reason they are better is because they don't have to worry about backwards compatibility. Sure the Windows USB drivers are stable but they suck in comparison. Microsoft could probably write better drivers now if they wanted to but they would have to sacrifice compatibility.

What people like you fail to realize is that a lot of the rewriting that goes on is re-factoring. There are advantages to stabilizing on an API but there are also advantages not to.

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