linux-kernel - RE: [PATCH v3 3/6] PCI/AER: Export cper_print

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Date:   Mon, 17 Apr 2023 16:11:20 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Terry Bowman <terry.bowman@....com>, <alison.schofield@...el.com>,
        <vishal.l.verma@...el.com>, <ira.weiny@...el.com>,
        <bwidawsk@...nel.org>, <dan.j.williams@...el.com>,
        <dave.jiang@...el.com>, <Jonathan.Cameron@...wei.com>,
        <linux-cxl@...r.kernel.org>
CC:     <terry.bowman@....com>, <rrichter@....com>,
        <linux-kernel@...r.kernel.org>, <bhelgaas@...gle.com>,
        Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
        Oliver O'Halloran <oohall@...il.com>,
        <linux-pci@...r.kernel.org>
Subject: RE: [PATCH v3 3/6] PCI/AER: Export cper_print_aer() for use by
 modules

Terry Bowman wrote:
> The CXL driver plans to use cper_print_aer() for restricted CXL host
> (RCH) logging. cper_print_aer() is not exported and as a result is not
> available to the CXL driver or other loadable modules. Export
> cper_print_aer() making it available to CXL and other loadable modules.
> 
> Signed-off-by: Terry Bowman <terry.bowman@....com>
> Cc: Mahesh J Salgaonkar <mahesh@...ux.ibm.com>
> Cc: "Oliver O'Halloran" <oohall@...il.com>
> Cc: Bjorn Helgaas <bhelgaas@...gle.com>
> Cc: linux-pci@...r.kernel.org
> ---
>  drivers/pci/pcie/aer.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> index f6c24ded134c..7a25b62d9e01 100644
> --- a/drivers/pci/pcie/aer.c
> +++ b/drivers/pci/pcie/aer.c
> @@ -812,6 +812,7 @@ void cper_print_aer(struct pci_dev *dev, int aer_severity,
>  	trace_aer_event(dev_name(&dev->dev), (status & ~mask),
>  			aer_severity, tlp_header_valid, &aer->header_log);
>  }
> +EXPORT_SYMBOL_GPL(cper_print_aer);

Same EXPORT_SYMBOL_NS_GPL() as the last patch, I can't imagine another
scenario where this symbol needs exporting.

Does this not need a stub in the CONFIG_PCIEAER=n case? Maybe that's
handled in the CXL code, I'll keep reading...