linux-kernel - Re: [for-next][PATCH 13/23] USB: mtu3: tracing: Use the new _

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Message-ID: <2893728a294ef13bdeba9e587083b82fb794cc68.camel@mediatek.com>
Date:   Tue, 19 Jul 2022 13:23:06 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Steven Rostedt <rostedt@...dmis.org>
CC:     <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...nel.org>,
        "Andrew Morton" <akpm@...ux-foundation.org>,
        <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [for-next][PATCH 13/23] USB: mtu3: tracing: Use the new
 __vstring() helper

On Fri, 2022-07-15 at 17:39 -0400, Steven Rostedt wrote:
> On Fri, 15 Jul 2022 14:32:05 +0800
> Chunfeng Yun <chunfeng.yun@...iatek.com> wrote:
> 
> > Can you help to remove macro "MTU3_MSG_MAX" and one blank line
> > after it
> > in this file, this macro is not used anymore after apply this
> > patch.
> 
> Care to send me a patch, and I'll just include it in my series?
Seems no need add another patch, just modify this patch as below:

diff --git a/drivers/usb/mtu3/mtu3_trace.h
b/drivers/usb/mtu3/mtu3_trace.h
index a09deae1146f..03d2a9bac27e 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))
 );
> 

remove below two lines
"
-#define MTU3_MSG_MAX   256
-
"
Thanks

> -- Steve