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

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Message-ID: <20250724100659.697b5972@batman.local.home>
Date: Thu, 24 Jul 2025 10:06:59 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: kernel test robot <lkp@...el.com>
Cc: Shuai Xue <xueshuai@...ux.alibaba.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,
 bhelgaas@...gle.com, 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

On Thu, 24 Jul 2025 03:30:17 +0800
kernel test robot <lkp@...el.com> wrote:

> url:    https://github.com/intel-lab-lkp/linux/commits/Shuai-Xue/PCI-trace-Add-a-generic-RAS-tracepoint-for-hotplug-event/20250723-113454
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git for-linus
> patch link:    https://lore.kernel.org/r/20250723033108.61587-3-xueshuai%40linux.alibaba.com
> patch subject: [PATCH v9 2/2] PCI: trace: Add a RAS tracepoint to monitor link speed changes
> config: sparc-sparc64_defconfig (https://download.01.org/0day-ci/archive/20250724/202507240322.nJGdyXsy-lkp@intel.com/config)
> compiler: sparc64-linux-gcc (GCC) 15.1.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250724/202507240322.nJGdyXsy-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202507240322.nJGdyXsy-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>    sparc64-linux-ld: drivers/pci/probe.o: in function `pcie_update_link_speed':
> >> probe.c:(.text+0x370): undefined reference to `__tracepoint_pcie_link_event'
> >> sparc64-linux-ld: probe.c:(.text+0x37c): undefined reference to `__tracepoint_pcie_link_event'
> >> sparc64-linux-ld: probe.c:(.text+0x3dc): undefined reference to `__traceiter_pcie_link_event'  

The config has:

# CONFIG_CPU_HOTPLUG_STATE_CONTROL is not set

Which looks to me from the first patch, would enable the code that
defines the trace events via the:

+#define CREATE_TRACE_POINTS
+#include <trace/events/pci.h>

Thus, without compiling that file, the tracepoints would not be created
and you would get the above errors.

-- Steve