Under the new kernel submission process, contributions to the Linux kernel may only be made by individuals who acknowledge their right to make the contribution under an appropriate open-source license. This acknowledgment, the DCO, is used to track contributions and contributors to Linux. The DCO ensures that appropriate attribution is given to developers of original contributions and derivative works, as well to those contributors who receive submissions and pass them, unchanged, up the kernel tree. All contributors are called upon to "sign off" on a submission before it can be considered for inclusion in the kernel.

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