Writing at Linux Journal, Greg Kroah-Hartman gives a tutorial on kernel development using 'patch' and 'diff' . . .

“Many issues involved with Linux kernel development are different from traditional software development processes. When working on a portion of the kernel (or a specific driver), you need to 1) stay aware of changes that are happening to other portions of the kernel with which you interact, 2) constantly apply your changes to the moving target of a fast-based kernel development release schedule, 3) resolve any merge conflicts between changes you have made and changes made by other people and 4) be able to export your changes in a format others can use easily . . . “

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