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cpu/hotplug: move to use bus_get_dev_root()

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Direct access to the struct bus_type dev_root pointer is going away soon
so replace that with a call to bus_get_dev_root() instead, which is what
it is there for.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Valentin Schneider <vschneid@redhat.com>
Cc: Phil Auld <pauld@redhat.com>
Cc: Steven Price <steven.price@arm.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Vincent Donnefort <vdonnefort@google.com>
Cc: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
Link: https://lore.kernel.org/r/20230313182918.1312597-7-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman
2023-03-13 19:28:49 +01:00
parent c8e15075b2
commit db281d59e2
1 changed files with 17 additions and 6 deletions
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23
kernel/cpu.c
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@@ -2569,22 +2569,33 @@ static const struct attribute_group cpuhp_smt_attr_group = {
static int __init cpu_smt_sysfs_init(void) static int __init cpu_smt_sysfs_init(void)
{ {
return sysfs_create_group(&cpu_subsys.dev_root->kobj, struct device *dev_root;
&cpuhp_smt_attr_group); int ret = -ENODEV;
dev_root = bus_get_dev_root(&cpu_subsys);
if (dev_root) {
ret = sysfs_create_group(&dev_root->kobj, &cpuhp_smt_attr_group);
put_device(dev_root);
}
return ret;
} }
static int __init cpuhp_sysfs_init(void) static int __init cpuhp_sysfs_init(void)
{ {
struct device *dev_root;
int cpu, ret; int cpu, ret;
ret = cpu_smt_sysfs_init(); ret = cpu_smt_sysfs_init();
if (ret) if (ret)
return ret; return ret;
ret = sysfs_create_group(&cpu_subsys.dev_root->kobj, dev_root = bus_get_dev_root(&cpu_subsys);
&cpuhp_cpu_root_attr_group); if (dev_root) {
if (ret) ret = sysfs_create_group(&dev_root->kobj, &cpuhp_cpu_root_attr_group);
return ret; put_device(dev_root);
if (ret)
return ret;
}
for_each_possible_cpu(cpu) { for_each_possible_cpu(cpu) {
struct device *dev = get_cpu_device(cpu); struct device *dev = get_cpu_device(cpu);