serial port buffer commit

From: David Chow (davidchow@shaolinmicro.com)
Date: Tue Nov 26 2002 - 10:56:06 EST

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Hi all,

I am writing a kernel thread for serial port communication. If the
serial character device file is opened by a filp_open() or manipulating
using a struct file in the kernel, how can I know whether the previous
written buffer has commit or not? Similarly, how do I know is there any
data ready for read for non blocking access? Thanks.

regards,
David Chow

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