Author: Huaqing Yuanjian Embedded Academy. \"Detailed Explanation of Linux Device Driver Development\" Chapter 10, Interrupts and Clocks. This chapter mainly explains interrupt and timer processing in Linux device driver programming. Since the execution of the interrupt service program does not exist in the process context, the time of the interrupt service program is required to be as short as possible. Therefore, Linux introduces a mechanism for separating the top half and the bottom half in interrupt processing. In addition, the clock processing in the kernel also adopts the interrupt method, and the kernel software timer ultimately depends on the clock interrupt.
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