RK3399 platform development series on introduction to (kernel) 1.52, printk function analysis - the function call will be closed

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By viewing the source code in linux-source/kernel/printk/printk.c, the printk function goes all the way through vprintk_func, >vprintk_default,
vprintk_emit, vprintk_store, log_output call the log_store function.

I. printk

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