xen: Switch to use kmemdup() helper

Use kmemdup() helper instead of open-coding to
simplify the code.

Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Chen Jiahao <chenjiahao16@huawei.com>
Link: https://lore.kernel.org/r/20230815092434.1206386-1-ruanjinjie@huawei.com
Signed-off-by: Juergen Gross <jgross@suse.com>

diff --git a/drivers/xen/xen-acpi-processor.c b/drivers/xen/xen-acpi-processor.c
index 9cb61db..2967039 100644 (file)
--- a/drivers/xen/xen-acpi-processor.c
+++ b/drivers/xen/xen-acpi-processor.c
@@ -473,11 +473,8 @@ static int xen_upload_processor_pm_data(void)
                if (!_pr)
                        continue;
 
-               if (!pr_backup) {
-                       pr_backup = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL);
-                       if (pr_backup)
-                               memcpy(pr_backup, _pr, sizeof(struct acpi_processor));
-               }
+               if (!pr_backup)
+                       pr_backup = kmemdup(_pr, sizeof(*_pr), GFP_KERNEL);
                (void)upload_pm_data(_pr);
        }