linux-kernel - Re: [PATCH v9 2/2] PCI: trace: Add a RAS tracepoint to monitor link speed changes

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Message-ID: <df38380f-c546-4de8-b228-9b1db319545a@linux.alibaba.com>
Date: Fri, 25 Jul 2025 11:18:45 +0800
From: Shuai Xue <xueshuai@...ux.alibaba.com>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: kernel test robot <lkp@...el.com>, Bjorn Helgaas <bhelgaas@...gle.com>,
 lukas@...ner.de, linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-edac@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
 helgaas@...nel.org, ilpo.jarvinen@...ux.intel.com, mattc@...estorage.com,
 Jonathan.Cameron@...wei.com, oe-kbuild-all@...ts.linux.dev,
 tony.luck@...el.com, bp@...en8.de, mhiramat@...nel.org,
 mathieu.desnoyers@...icios.com, oleg@...hat.com, naveen@...nel.org,
 davem@...emloft.net, anil.s.keshavamurthy@...el.com, mark.rutland@....com,
 peterz@...radead.org, tianruidong@...ux.alibaba.com
Subject: Re: [PATCH v9 2/2] PCI: trace: Add a RAS tracepoint to monitor link
 speed changes



在 2025/7/25 10:57, Steven Rostedt 写道:
> On Fri, 25 Jul 2025 10:31:45 +0800
> Shuai Xue <xueshuai@...ux.alibaba.com> wrote:
> 
>> I'm leaning toward option 1 (dedicated trace.c file) as it's the
>> cleanest approach and follows the pattern used in other subsystems. Does
>> that sound reasonable to you?
> 
> That's fine, but make sure you have #ifdef CONFIG_FOO around tracepoints
> that are only used when those configs are enabled, otherwise you will get
> warnings.
> 
> Well, if they are exported, then the warnings are suppressed.
> 
>    https://lore.kernel.org/all/20250725025149.726267838@kernel.org/
> 
> -- Steve

Hi Steve,

Got it. Thanks for the important reminder about the CONFIG guards!

Best regards,
Shuai