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並前往https://kernelnewbies.kernelnewbies.narkive.com/QbQND9Xs/creating-a-character-device-using-device-create-is-failing

creating a character device using device_create is failing.

The function device_create() does the same, but it seems to be failing in my case. Here is the part of the code #define MYMAJOR 200 struct mydevice {

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