trace_printk man page on Oracle

trace_printk man page on Oracle

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TRACE_PRINTK(9)			 Driver Basics		       TRACE_PRINTK(9)

NAME
       trace_printk - printf formatting in the ftrace buffer

SYNOPSIS
       trace_printk(fmt, args...);

ARGUMENTS
       fmt
	   the printf format for printing

       args...
	   variable arguments

NOTE
       __trace_printk is an internal function for trace_printk and the ip is
       passed in via the trace_printk macro.

       This function allows a kernel developer to debug fast path sections
       that printk is not appropriate for. By scattering in various printk
       like tracing in the code, a developer can quickly see where problems
       are occurring.

       This is intended as a debugging tool for the developer only. Please
       refrain from leaving trace_printks scattered around in your code.

COPYRIGHT
Kernel Hackers Manual 3.8.	   June 2014		       TRACE_PRINTK(9)

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