Prepatches are the equivalent to alpha releases for Linux; they live in the testing directories in the archives. They should be applied using the patch(1) utility to the source code of the previous full release. The testing/incr directories contain automatically generated patches from one prepatch to another.
Prepatches may be poorly tested, and may in fact not work at all. Use on your own risk; if you use one and run into a problem please see Reporting Linux Kernel Bugs on the front page.
Prepatches with -rc in the name are considered release candidates and may become full versions. It is therefore particularly important that those get tested.
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i already post this several times. i will not do it anymore.
although my per hour pay is low, but i can not waste my time to do duplicate work.