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What is the simplest way to send data from kernel to user-space?
Is it possible to use the read system call in the user space program?
If yes, please explain how to do so.
I want the user to read data only when something is written by the kernel module. Is it possible to achieve this kind of synchronisation between the user-space program and the kernel module?
Well, that's possible and that's exactly where I'd use the above mentioned system calls. In the kernel module, in the reader part, use the call copy_to_user() and in the writer, use copy_from_user().
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