Commit 659372d3 authored by Steven Rostedt's avatar Steven Rostedt Committed by Steven Rostedt
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tracing: add trace_array_printk for internal tracers to use 



This patch adds a trace_array_printk to allow a tracer to use the
trace_printk on its own trace array.

Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent e77405ad

kernel/trace/trace.c

+22 −2
Original line number Diff line number Diff line
@@ -1201,7 +1201,23 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args) 
}

EXPORT_SYMBOL_GPL(trace_vbprintk);



int trace_vprintk(unsigned long ip, const char *fmt, va_list args)

int trace_array_printk(struct trace_array *tr,

		       unsigned long ip, const char *fmt, ...)

{

	int ret;

	va_list ap;



	if (!(trace_flags & TRACE_ITER_PRINTK))

		return 0;



	va_start(ap, fmt);

	ret = trace_array_vprintk(tr, ip, fmt, ap);

	va_end(ap);

	return ret;

}



int trace_array_vprintk(struct trace_array *tr,

			unsigned long ip, const char *fmt, va_list args)

{

	static raw_spinlock_t trace_buf_lock = __RAW_SPIN_LOCK_UNLOCKED;

	static char trace_buf[TRACE_BUF_SIZE];
@@ -1209,7 +1225,6 @@ int trace_vprintk(unsigned long ip, const char *fmt, va_list args) 
	struct ftrace_event_call *call = &event_print;

	struct ring_buffer_event *event;

	struct ring_buffer *buffer;

	struct trace_array *tr = &global_trace;

	struct trace_array_cpu *data;

	int cpu, len = 0, size, pc;

	struct print_entry *entry;
@@ -1260,6 +1275,11 @@ int trace_vprintk(unsigned long ip, const char *fmt, va_list args) 


	return len;

}



int trace_vprintk(unsigned long ip, const char *fmt, va_list args)

{

	return trace_array_printk(&global_trace, ip, fmt, args);

}

EXPORT_SYMBOL_GPL(trace_vprintk);



enum trace_file_type {

kernel/trace/trace.h

+5 −0
Original line number Diff line number Diff line
@@ -566,6 +566,11 @@ extern int 
trace_vbprintk(unsigned long ip, const char *fmt, va_list args);

extern int

trace_vprintk(unsigned long ip, const char *fmt, va_list args);

extern int

trace_array_vprintk(struct trace_array *tr,

		    unsigned long ip, const char *fmt, va_list args);

int trace_array_printk(struct trace_array *tr,

		       unsigned long ip, const char *fmt, ...);



extern unsigned long trace_flags;