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tracing: #ifdef out uses of max trace when CONFIG_TRACER_MAX_TRACE is not set

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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: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Chen Gang 2015-11-10 05:15:15 +08:00 committed by Steven Rostedt
parent 03e88ae6b3
commit e428abbbf6
1 changed files with 6 additions and 0 deletions
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6
kernel/trace/trace.c
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@ -4548,6 +4548,8 @@ out:
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,