linux-kernel - Re: [PATCH 1/2] PCI: make pci_dev_is_disconnected() helper public for other drivers

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Date:   Wed, 13 Dec 2023 11:49:30 +0100
From:   Lukas Wunner <lukas@...ner.de>
To:     Ethan Zhao <haifeng.zhao@...ux.intel.com>
Cc:     bhelgaas@...gle.com, baolu.lu@...ux.intel.com, dwmw2@...radead.org,
        will@...nel.org, robin.murphy@....com, linux-pci@...r.kernel.org,
        iommu@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Haorong Ye <yehaorong@...edance.com>
Subject: Re: [PATCH 1/2] PCI: make pci_dev_is_disconnected() helper public
 for other drivers

On Tue, Dec 12, 2023 at 10:46:36PM -0500, Ethan Zhao wrote:
> move pci_dev_is_disconnected() from driver/pci/pci.h to public
> include/linux/pci.h for other driver's reference.
> no function change.

That's merely a prose description of the code.  A reader can already
see from the code what it's doing.  You need to explain the *reason*
for the change instead.  E.g.:  "Make pci_dev_is_disconnected() public
so that it can be called from $DRIVER to speed up hot removal
handling which may otherwise take seconds because of $REASONS."

Thanks,

Lukas