linux-kernel - Re: [PATCH v11 20/23] CXL/PCI: Export and rename merge_result() to pci_ers_merge

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Message-ID: <aK67_CP7l7c7CSPp@wunner.de>
Date: Wed, 27 Aug 2025 10:04:12 +0200
From: Lukas Wunner <lukas@...ner.de>
To: Terry Bowman <terry.bowman@....com>
Cc: dave@...olabs.net, jonathan.cameron@...wei.com, dave.jiang@...el.com,
	alison.schofield@...el.com, dan.j.williams@...el.com,
	bhelgaas@...gle.com, shiju.jose@...wei.com, ming.li@...omail.com,
	Smita.KoralahalliChannabasappa@....com, rrichter@....com,
	dan.carpenter@...aro.org, PradeepVineshReddy.Kodamati@....com,
	Benjamin.Cheatham@....com,
	sathyanarayanan.kuppuswamy@...ux.intel.com,
	linux-cxl@...r.kernel.org, alucerop@....com, ira.weiny@...el.com,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH v11 20/23] CXL/PCI: Export and rename merge_result() to
 pci_ers_merge_result()

On Tue, Aug 26, 2025 at 08:35:35PM -0500, Terry Bowman wrote:
> +++ b/include/linux/pci.h
> @@ -2760,6 +2760,17 @@ static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
>  void pci_uevent_ers(struct pci_dev *pdev, enum  pci_ers_result err_type);
>  #endif
>  
> +#if defined(CONFIG_PCIEAER)
> +pci_ers_result_t pci_ers_merge_result(enum pci_ers_result orig,
> +				      enum pci_ers_result new);
> +#else
> +static inline pci_ers_result_t pci_ers_merge_result(enum pci_ers_result orig,
> +						    enum pci_ers_result new)
> +{
> +	return PCI_ERS_RESULT_NONE;
> +}
> +#endif
> +
>  #include <linux/dma-mapping.h>
>  
>  #define pci_emerg(pdev, fmt, arg...)	dev_emerg(&(pdev)->dev, fmt, ##arg)

Would it be possible for you to just declare a local version of
pci_ers_merge_result() within drivers/cxl/ which is encapsulated by
"#ifndef CONFIG_PCIEAER"?

That would avoid the need to make this public in include/linux/pci.h.

Thanks,

Lukas