tracing: Fix trace_buf_size boot option

We should be able to specify [KMG] when setting trace_buf_size
boot option, as documented in kernel-parameters.txt

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4A41F2DB.4020102@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 3 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 3bb31006b5cc..3aa0a0dfdfa8 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -284,13 +284,12 @@ void trace_wake_up(void)
 static int __init set_buf_size(char *str)
 {
         unsigned long buf_size;
-        int ret;
 
         if (!str)
                 return 0;
-        ret = strict_strtoul(str, 0, &buf_size);
+        buf_size = memparse(str, &str);
         /* nr_entries can not be zero */
-        if (ret < 0 || buf_size == 0)
+        if (buf_size == 0)
                 return 0;
         trace_buf_size = buf_size;
         return 1;