linux-kernel - [PATCH 1/4] powerpc: vio: move device attributes into a new ifdef

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Message-Id: <20240209-bus_cleanup-powerpc2-v1-1-79a56dcaebb1@marliere.net>
Date: Fri, 09 Feb 2024 21:07:16 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Michael Ellerman <mpe@...erman.id.au>, 
 Nicholas Piggin <npiggin@...il.com>, 
 Christophe Leroy <christophe.leroy@...roup.eu>, 
 "Aneesh Kumar K.V" <aneesh.kumar@...nel.org>, 
 "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>
Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH 1/4] powerpc: vio: move device attributes into a new ifdef

In order to make the distinction of the vio_bus_type variable based on
CONFIG_PPC_SMLPAR more explicit, move the required structs into a new
ifdef block. This is needed in order to make vio_bus_type const and
because the distinction is made explicit, there is no need to set the
fields within the vio_cmo_sysfs_init function.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 arch/powerpc/platforms/pseries/vio.c | 59 +++++++++++++++++++++---------------
 1 file changed, 34 insertions(+), 25 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c
index 2dc9cbc4bcd8..6c58824190a2 100644
--- a/arch/powerpc/platforms/pseries/vio.c
+++ b/arch/powerpc/platforms/pseries/vio.c
@@ -991,18 +991,6 @@ static DEVICE_ATTR_RO(cmo_allocated);
 static DEVICE_ATTR_RW(cmo_desired);
 static DEVICE_ATTR_RW(cmo_allocs_failed);
 
-static struct attribute *vio_cmo_dev_attrs[] = {
-	&dev_attr_name.attr,
-	&dev_attr_devspec.attr,
-	&dev_attr_modalias.attr,
-	&dev_attr_cmo_entitled.attr,
-	&dev_attr_cmo_allocated.attr,
-	&dev_attr_cmo_desired.attr,
-	&dev_attr_cmo_allocs_failed.attr,
-	NULL,
-};
-ATTRIBUTE_GROUPS(vio_cmo_dev);
-
 /* sysfs bus functions and data structures for CMO */
 
 #define viobus_cmo_rd_attr(name)                                        \
@@ -1062,11 +1050,7 @@ static struct attribute *vio_bus_attrs[] = {
 };
 ATTRIBUTE_GROUPS(vio_bus);
 
-static void __init vio_cmo_sysfs_init(void)
-{
-	vio_bus_type.dev_groups = vio_cmo_dev_groups;
-	vio_bus_type.bus_groups = vio_bus_groups;
-}
+static void __init vio_cmo_sysfs_init(void) { }
 #else /* CONFIG_PPC_SMLPAR */
 int vio_cmo_entitlement_update(size_t new_entitlement) { return 0; }
 void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired) {}
@@ -1584,14 +1568,6 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR_RO(modalias);
 
-static struct attribute *vio_dev_attrs[] = {
-	&dev_attr_name.attr,
-	&dev_attr_devspec.attr,
-	&dev_attr_modalias.attr,
-	NULL,
-};
-ATTRIBUTE_GROUPS(vio_dev);
-
 void vio_unregister_device(struct vio_dev *viodev)
 {
 	device_unregister(&viodev->dev);
@@ -1626,6 +1602,38 @@ static int vio_hotplug(const struct device *dev, struct kobj_uevent_env *env)
 	return 0;
 }
 
+#ifdef CONFIG_PPC_SMLPAR
+static struct attribute *vio_cmo_dev_attrs[] = {
+	&dev_attr_name.attr,
+	&dev_attr_devspec.attr,
+	&dev_attr_modalias.attr,
+	&dev_attr_cmo_entitled.attr,
+	&dev_attr_cmo_allocated.attr,
+	&dev_attr_cmo_desired.attr,
+	&dev_attr_cmo_allocs_failed.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(vio_cmo_dev);
+
+struct bus_type vio_bus_type = {
+	.name = "vio",
+	.dev_groups = vio_cmo_dev_groups,
+	.bus_groups = vio_bus_groups,
+	.uevent = vio_hotplug,
+	.match = vio_bus_match,
+	.probe = vio_bus_probe,
+	.remove = vio_bus_remove,
+	.shutdown = vio_bus_shutdown,
+};
+#else /* CONFIG_PPC_SMLPAR */
+static struct attribute *vio_dev_attrs[] = {
+	&dev_attr_name.attr,
+	&dev_attr_devspec.attr,
+	&dev_attr_modalias.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(vio_dev);
+
 struct bus_type vio_bus_type = {
 	.name = "vio",
 	.dev_groups = vio_dev_groups,
@@ -1635,6 +1643,7 @@ struct bus_type vio_bus_type = {
 	.remove = vio_bus_remove,
 	.shutdown = vio_bus_shutdown,
 };
+#endif /* CONFIG_PPC_SMLPAR */
 
 /**
  * vio_get_attribute: - get attribute for virtual device

-- 
2.43.0