trace_puts — write a string into the ftrace buffer
trace_puts ( | str); |
__trace_bputs is an internal function for trace_puts and
the ip is passed in via the trace_puts macro.
This is similar to trace_printk but is made for those really fast
paths that a developer wants the least amount of “Heisenbug” affects,
where the processing of the print format is still too much.
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_puts scattered around in
your code. (Extra memory is used for special buffers that are
allocated when trace_puts is used)