1 files changed, 2 insertions, 11 deletions

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index e1538071660d..458018a1ac9a 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -803,19 +803,10 @@ ftrace_profile_write(struct file *filp, const char __user *ubuf,
                      size_t cnt, loff_t *ppos)
 {
         unsigned long val;
-        char buf[64];           /* big enough to hold a number */
         int ret;
 
-        if (cnt >= sizeof(buf))
-                return -EINVAL;
-
-        if (copy_from_user(&buf, ubuf, cnt))
-                return -EFAULT;
-
-        buf[cnt] = 0;
-
-        ret = strict_strtoul(buf, 10, &val);
-        if (ret < 0)
+        ret = kstrtoul_from_user(ubuf, cnt, 10, &val);
+        if (ret)
                 return ret;
 
         val = !!val;