From e428abbbf616cd8fdd1162e4a624ad1d47b47544 Mon Sep 17 00:00:00 2001 From: Chen Gang Date: Tue, 10 Nov 2015 05:15:15 +0800 Subject: tracing: #ifdef out uses of max trace when CONFIG_TRACER_MAX_TRACE is not set MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Steven Rostedt --- kernel/trace/trace.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'kernel') diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index b11582618991..87fb9801bd9e 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -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, -- cgit v1.2.3