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Commit e428abbb authored by Chen Gang's avatar Chen Gang Committed by Steven Rostedt
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tracing: #ifdef out uses of max trace when CONFIG_TRACER_MAX_TRACE is not set 



tracing_max_lat_fops is used only when TRACER_MAX_TRACE enabled, so also
swith the related code. The related warning with defconfig under x86_64:

    CC      kernel/trace/trace.o
  kernel/trace/trace.c:5466:37: warning: ‘tracing_max_lat_fops’ defined but not used [-Wunused-const-variable]
   static const struct file_operations tracing_max_lat_fops = {

Signed-off-by: default avatarChen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 03e88ae6

kernel/trace/trace.c

+6 −0
Original line number Diff line number Diff line
@@ -4548,6 +4548,8 @@ tracing_thresh_write(struct file *filp, const char __user *ubuf, 
	return ret;

}



#ifdef CONFIG_TRACER_MAX_TRACE



static ssize_t

tracing_max_lat_read(struct file *filp, char __user *ubuf,

		     size_t cnt, loff_t *ppos)
@@ -4562,6 +4564,8 @@ tracing_max_lat_write(struct file *filp, const char __user *ubuf, 
	return tracing_nsecs_write(filp->private_data, ubuf, cnt, ppos);

}



#endif



static int tracing_open_pipe(struct inode *inode, struct file *filp)

{

	struct trace_array *tr = inode->i_private;
@@ -5463,12 +5467,14 @@ static const struct file_operations tracing_thresh_fops = { 
	.llseek		= generic_file_llseek,

};



#ifdef CONFIG_TRACER_MAX_TRACE

static const struct file_operations tracing_max_lat_fops = {

	.open		= tracing_open_generic,

	.read		= tracing_max_lat_read,

	.write		= tracing_max_lat_write,

	.llseek		= generic_file_llseek,

};

#endif



static const struct file_operations set_tracer_fops = {

	.open		= tracing_open_generic,