[PATCH] trace: code optimization

[liuyang34]

use scnprintf instead of snprinr and no need to check
the return size again

Signed-off-by: liuyang34 <liuyang34@xxxxxxxxxx>
---
 kernel/trace/trace_stack.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index c557f42..7b15e9a 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -329,9 +329,7 @@ stack_max_size_read(struct file *filp, char __user *ubuf,
 	char buf[64];
 	int r;
 
-	r = snprintf(buf, sizeof(buf), "%ld\n", *ptr);
-	if (r > sizeof(buf))
-		r = sizeof(buf);
+	r = scnprintf(buf, sizeof(buf), "%ld\n", *ptr);
 	return simple_read_from_buffer(ubuf, count, ppos, buf, r);
 }
 
-- 
2.7.4