#include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/acpi.h>
-#include <asm/signal.h>
+#include <linux/signal.h>
+#include <linux/kthread.h>
 
 #include <acpi/acpi_drivers.h>
 #include <acpi/acinterp.h>     /* for acpi_ex_eisa_id_to_string() */
        acpi_status status;
        acpi_object_type type = 0;
        struct acpi_device *acpi_device = to_acpi_device(d);
+       struct task_struct *task;
 
        if ((!count) || (buf[0] != '1')) {
                return -EINVAL;
        }
 
        /* remove the device in another thread to fix the deadlock issue */
-       ret = kernel_thread(acpi_bus_hot_remove_device,
-                               acpi_device->handle, SIGCHLD);
-      err:
+       task = kthread_run(acpi_bus_hot_remove_device,
+                               acpi_device->handle, "acpi_hot_remove_device");
+       if (IS_ERR(task))
+               ret = PTR_ERR(task);
+err:
        return ret;
 }