linux-kernel - Re: [PATCH] PCI/ASPM: Unexport internal ASPM interfaces

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Message-ID: <20180110214027.GC241460@bhelgaas-glaptop.roam.corp.google.com>
Date:   Wed, 10 Jan 2018 15:40:27 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     linux-pci@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI/ASPM: Unexport internal ASPM interfaces

On Fri, Dec 15, 2017 at 03:30:02PM -0600, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@...gle.com>
> 
> Several of the interfaces defined in include/linux/pci-aspm.h are used only
> internally from the PCI core:
> 
>   pcie_aspm_init_link_state()
>   pcie_aspm_exit_link_state()
>   pcie_aspm_pm_state_change()
>   pcie_aspm_powersave_config_link()
>   pcie_aspm_create_sysfs_dev_files()
>   pcie_aspm_remove_sysfs_dev_files()
> 
> Move these to the internal drivers/pci/pci.h header so they don't clutter
> the driver interface.
> 
> Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>

This is on pci/aspm for v4.16.

> ---
>  drivers/pci/pci.h        |   20 ++++++++++++++++++++
>  include/linux/pci-aspm.h |   35 ++---------------------------------
>  2 files changed, 22 insertions(+), 33 deletions(-)
> 
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index f6b58b32a67c..e90009fff1a9 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -342,6 +342,26 @@ static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
>  
>  void pci_enable_acs(struct pci_dev *dev);
>  
> +#ifdef CONFIG_PCIEASPM
> +void pcie_aspm_init_link_state(struct pci_dev *pdev);
> +void pcie_aspm_exit_link_state(struct pci_dev *pdev);
> +void pcie_aspm_pm_state_change(struct pci_dev *pdev);
> +void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
> +#else
> +static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { }
> +static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { }
> +static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev) { }
> +static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { }
> +#endif
> +
> +#ifdef CONFIG_PCIEASPM_DEBUG
> +void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
> +void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
> +#else
> +static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev) { }
> +static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev) { }
> +#endif
> +
>  #ifdef CONFIG_PCIE_PTM
>  void pci_ptm_init(struct pci_dev *dev);
>  #else
> diff --git a/include/linux/pci-aspm.h b/include/linux/pci-aspm.h
> index 3cc06b059017..df28af5cef21 100644
> --- a/include/linux/pci-aspm.h
> +++ b/include/linux/pci-aspm.h
> @@ -24,43 +24,12 @@
>  #define PCIE_LINK_STATE_CLKPM	4
>  
>  #ifdef CONFIG_PCIEASPM
> -void pcie_aspm_init_link_state(struct pci_dev *pdev);
> -void pcie_aspm_exit_link_state(struct pci_dev *pdev);
> -void pcie_aspm_pm_state_change(struct pci_dev *pdev);
> -void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
>  void pci_disable_link_state(struct pci_dev *pdev, int state);
>  void pci_disable_link_state_locked(struct pci_dev *pdev, int state);
>  void pcie_no_aspm(void);
>  #else
> -static inline void pcie_aspm_init_link_state(struct pci_dev *pdev)
> -{
> -}
> -static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev)
> -{
> -}
> -static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev)
> -{
> -}
> -static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev)
> -{
> -}
> -static inline void pci_disable_link_state(struct pci_dev *pdev, int state)
> -{
> -}
> -static inline void pcie_no_aspm(void)
> -{
> -}
> +static inline void pci_disable_link_state(struct pci_dev *pdev, int state) { }
> +static inline void pcie_no_aspm(void) { }
>  #endif
>  
> -#ifdef CONFIG_PCIEASPM_DEBUG /* this depends on CONFIG_PCIEASPM */
> -void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
> -void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
> -#else
> -static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev)
> -{
> -}
> -static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev)
> -{
> -}
> -#endif
>  #endif /* LINUX_ASPM_H */
>