Adding proprietary technology to Linux

How does Linux allow for the addition of patented or proprietary technology? Suppose, e.g., someone had network technology that doubled Linux bandwidth. Would it be possible to offer the technology for a fee without publishing the source code back to Linux.

Thanks for any thoughts.

steva
stevaAsked:
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laeuchliCommented:
Not if you edited the kernal. If you made a application that did it, it would be fine, but if you changed the kernal, you can't make money off it. FreeBSD allows you to do this, but not linux.
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stevaAuthor Commented:
Hmmmm... So does that mean that if you write a linux driver for your special Gigabit Ethernet card, you can't charge for it?

steva

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laeuchliCommented:
No, I think drivers are ok, not being part of the kernal.
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