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x86/microcode: 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: Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: x86@kernel.org
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lore.kernel.org/r/20230313182918.1312597-9-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-03-13 19:28:51 +01:00
parent 686f669780
commit 216f58beb2
1 changed files with 9 additions and 4 deletions
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13
arch/x86/kernel/cpu/microcode/core.c
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@ -632,6 +632,7 @@ static const struct attribute_group cpu_root_microcode_group = {
static int __init microcode_init(void)
{
struct device *dev_root;
struct cpuinfo_x86 *c = &boot_cpu_data;
int error;
@ -652,10 +653,14 @@ static int __init microcode_init(void)
if (IS_ERR(microcode_pdev))
return PTR_ERR(microcode_pdev);
error = sysfs_create_group(&cpu_subsys.dev_root->kobj, &cpu_root_microcode_group);
if (error) {
pr_err("Error creating microcode group!\n");
goto out_pdev;
dev_root = bus_get_dev_root(&cpu_subsys);
if (dev_root) {
error = sysfs_create_group(&dev_root->kobj, &cpu_root_microcode_group);
put_device(dev_root);
if (error) {
pr_err("Error creating microcode group!\n");
goto out_pdev;
}
}
/* Do per-CPU setup */