diff options
| author | Steven Rostedt (Google) <[email protected]> | 2022-07-19 11:27:19 -0400 |
|---|---|---|
| committer | Steven Rostedt (Google) <[email protected]> | 2022-07-24 19:11:18 -0400 |
| commit | 730dbb8ddac6b92573658c3cb03555df1bdf95aa (patch) | |
| tree | 6029490e490dff37c7158216160b04341a6b7861 | |
| parent | f71f3ba9b42381c2e52c079a0104e11c30ca4cc2 (diff) | |
USB: mtu3: tracing: Use the new __vstring() helper
Instead of open coding a __dynamic_array() with a fixed length (which
defeats the purpose of the dynamic array in the first place). Use the new
__vstring() helper that will use a va_list and only write enough of the
string into the ring buffer that is needed.
Link: https://lkml.kernel.org/r/[email protected]
Cc: Ingo Molnar <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Acked-by: Greg Kroah-Hartman <[email protected]>
Tested-by: Chunfeng Yun <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>
| -rw-r--r-- | drivers/usb/mtu3/mtu3_trace.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/usb/mtu3/mtu3_trace.h b/drivers/usb/mtu3/mtu3_trace.h index 1b897636daf2..a98fa012b729 100644 --- a/drivers/usb/mtu3/mtu3_trace.h +++ b/drivers/usb/mtu3/mtu3_trace.h @@ -18,18 +18,16 @@ #include "mtu3.h" -#define MTU3_MSG_MAX 256 - TRACE_EVENT(mtu3_log, TP_PROTO(struct device *dev, struct va_format *vaf), TP_ARGS(dev, vaf), TP_STRUCT__entry( __string(name, dev_name(dev)) - __dynamic_array(char, msg, MTU3_MSG_MAX) + __vstring(msg, vaf->fmt, vaf->va) ), TP_fast_assign( __assign_str(name, dev_name(dev)); - vsnprintf(__get_str(msg), MTU3_MSG_MAX, vaf->fmt, *vaf->va); + __assign_vstr(msg, vaf->fmt, vaf->va); ), TP_printk("%s: %s", __get_str(name), __get_str(msg)) ); |