linux-kernel - [PATCH] pci: endpoint: make pci_epf_bus

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Message-Id: <20240204-bus_cleanup-pci-v1-1-300267a1e99e@marliere.net>
Date: Sun, 04 Feb 2024 17:28:58 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kw@...ux.com>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, 
 Bjorn Helgaas <bhelgaas@...gle.com>
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH] pci: endpoint: make pci_epf_bus_type const

Now that the driver core can properly handle constant struct bus_type,
move the pci_epf_bus_type variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 drivers/pci/endpoint/pci-epf-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
index 2c32de667937..bf655383e5ed 100644
--- a/drivers/pci/endpoint/pci-epf-core.c
+++ b/drivers/pci/endpoint/pci-epf-core.c
@@ -17,7 +17,7 @@

 static DEFINE_MUTEX(pci_epf_mutex);

-static struct bus_type pci_epf_bus_type;
+static const struct bus_type pci_epf_bus_type;
 static const struct device_type pci_epf_type;

 /**
@@ -507,7 +507,7 @@ static void pci_epf_device_remove(struct device *dev)
 	epf->driver = NULL;
 }

-static struct bus_type pci_epf_bus_type = {
+static const struct bus_type pci_epf_bus_type = {
 	.name		= "pci-epf",
 	.match		= pci_epf_device_match,
 	.probe		= pci_epf_device_probe,

---
base-commit: 1281aa073d3701b03cc6e716dc128df5ba47509d
change-id: 20240204-bus_cleanup-pci-f70b6d5a5bcf

Best regards,
-- 
Ricardo B. Marliere <ricardo@...liere.net>